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Vision and Light

Tokay Geckos Decline

Learning Module

Abstract

Students investigate the role that animal senses, primarily vision, play in survival as they try to understand a realistic fictional problem with a real organism. They investigate why there is a decline in the number of Tokay geckos living in one area of a rain forest in the Philippines. Humans change the environments in which we live in many ways—clearing forests to make roads and build houses, removing species of plants and animals that are dangerous to humans, installing lights to make it easier to see at night, and so on. Often these changes affect other species’ survival in unanticipated ways.

Keywords

environment, function, investigate, observe, predator, prey, sense, structure, survive, variable, vision

Overall Purpose

The purpose of the learning module is to help students to investigate the role that animal senses, primarily vision, play in survival. Students try to understand the reason for the decline in the Tokay gecko population in a rain forest that has been cleared for roads that are lit during night hours. Students use digital simulation, read informational text, evaluate models, and write about their thinking. The module is intended for a 4th grade class. 

Prior knowledge

Students are expected to have had many everyday experiences using their senses to see, smell, hear, taste, and touch. Students are likely to understand that animals need to find food and avoid being eaten to survive in their environment.

Students have learned to use the Claim-Evidence-Reasoning (CER) format to explain their thinking.

Students have been trained in the RISE Meaningful Feedback Model.

Learning Design:

The learning module will take approximately two and a half weeks to complete. The teacher can adjust the timeline according to the needs of the students. The module will be delivered through synchronized sessions. The author of the module has taught elements of this module previously but has not delivered the whole unit because of a lack of time.

Pedagogy: The learning module uses the four Knowledge Processes experiencing, conceptualizing, applying, and analyzing developed by the Learning by Design pedagogy.  Students will share knowledge through posts and updates in order to learn from each other. Through peer interactions and teacher guided discussions, Vygotsky's concept of the zone of proximal development (ZPD) is utilized in the design of the module (Vygotsky, 1978).

Structure: The structure below will be used for student lessons and the teacher directions for each session.

Learner's structure that appears on the left side of module:

  • Key Concepts or Vocabulary: Directs the student's attention to the goal of the lesson
  • Think About it: Activates the student's prior knowledge and focus their learning
  • Explore: Learning activities to build and apply knowledge and understanding
  • Communicate: Students reflect and share synthesized learning

Teacher's structure that appears on the right side of module:

  • Knowledge Process/Learning Objectives: The purpose of the update and what students will learn along with a Next Generation Science Standard statement constructed with 3-D model is provided.
  • Duration
  • Resources
  • Teacher Notes: The section will outline the duration, resources, and teaching tips for the instructor.

Learning Goals

Learner

We’re about to begin a new science unit during which we’ll be learning about how animals survive in their environment. You will take on the role of a conservationist biologist.

Conservation biology is the branch of biology focused on learning how to manage Earth’s biodiversity, and protect (and restore) species and their ecosystems from various causes of destruction or extinction. Conservationists carry out ecosystem protections and restorations, according to sound science. There are many conservation groups as well as government efforts worldwide aimed at studying and protecting threatened species and habitats. One of the goals of conservation is not to increase the numbers of all organisms in an ecosystem, but to maintain healthy numbers of the various organisms throughout an ecosystem. This might mean taking steps to decrease certain populations, like invasive (non-native) species or other species that are harming other species by using too many of the ecosystem’s natural resources or causing other damages.

Your class will receive messages from the Rain Forest Conservation Group, which needs our help with a problem they are trying to solve. Since placing a well-lit highway close to forest habitat, there has been a decrease in the population of Tokay geckos that live in the surrounding trees. Can you help solve the mystery of why?

Educator

Next Generation Science Standards

  • Performance Expectations:  4-LS1-1; 4-LS1-2; 4-PS4-2
  • Science and Engineering Practices: Practice 1; 2; 3; 4; 6; 8
  • Disciplinary Core Ideas: LS1.A; LS1.D; PS4.B
  • Crosscutting Concepts: Structure and Function; Systems and System Models; Cause and Effect

Common Core State Standards for English Language Arts

  • Reading Informational Text: CCSS.ELA-LITERACY.RI.4.1; RI.4.3; RI.4.7; RI.4.10
  • Writing: CCSS.ELA-LITERACY.W.4.2; W.4.4; W.4.7; W.4.8; W.4.9; W.4.10
  • Speaking and Listening: CCSS.ELA-LITERACY.SL.4.1; SL.4.2; SL.4.4
  • Language: CCSS.ELA-LITERACY.L.4.4; L.4.6 

Update 1: Conservation Biologists

Learner

Complete the survey

Take this survey. You will take it again at the end of the module. Please answer the questions as honestly as you can.  Click here for the survey.

Key Concepts:

  • Animals have different structures that allow them to get information from their environment.
  • Sound and scent can carry information about the environment to an animal.

Think About It!

(Amplify, 2016)

In your science notebook: Analyze the image using the questions below. 

  • What kind of information would the monkeys need in order to help them find food, water, and safety?
  • How would the monkeys know that food is nearby?
  • How do they get information about water?
  • How do they get information about avoiding predators or other sources of danger?
  • What is one kind of information the monkeys can get from their environment?
  • How do the monkeys get that information?

Explore

(Khan, 2021)

Part 1: Your role as a conversation Biologists.

The Rain Forest Conservation Group has contacted us because there’s a problem with this animal in this area of the rainforest. There are fewer Tokay geckos than there used to be, and people are wondering why this happened. They are worried that something is making it hard for the geckos to survive.

According to the message, the Tokay gecko lives in rainforests. Use Google Maps to find the locations of rainforests around the world.

Zoom into the Philippine Islands. Tokay geckos are a type of lizard found in the rain forests there. What do you know about rainforests?

For the next few weeks, you will take on the role of conservation biologists. You will work to figure out why there are fewer Tokay geckos in this area of the rainforest.

The word conservation means saving or protecting. A conservation biologist is someone who works to protect plants and animals in an environment. These conservation biologists are studying plants and animals in an environment in order to see if they are healthy.

One thing conservation biologists do is count the numbers of plants and animals in an area. If there are fewer plants or animals than usual, they learn more about those plants or animals to try to figure out why they are not surviving as well as they used to. If this seems like a problem for the environment, they work to find a solution that will allow more of those plants or animals to survive.

The message that the Rain Forest Conservation Group sent to us mentioned that the geckos might be having trouble surviving in their environment. As you work in your role as conservation biologists, you’ll investigate what could be making it hard for the geckos to survive. Eventually, you’ll share your findings with the Rain Forest Conservation Group.

Before we can figure out what could be making it hard for the Tokay geckos to survive in their environment, we need to think about what it means for something to survive

Animals need food, water, and a way to stay safe from other animals who may try to eat them. In order to find these things, they need to get information from their environment—where their food is, where they can hide, and what other animals are nearby. But, how do animals get this information?

Part 2: Investigating Animal Senses

Before reading the book,  Investigating Animal Senses, read the sentences below. Copy the statements into your notebook. If you agree with the sentence, write an “A” on the line before the sentence. If you disagree with the sentence, write a “D” on the line before the sentence.

________Only scientists do science investigations.

________ When scientists investigate, they start with a question and then think of ways to test out some possible answers.

________ Hearing, vision, and taste are the three senses that animals use.

________ Vision is the best sense that animals can use to learn about their environment.

________ When you do an investigation, you should change only one thing at a time.

Read Investigating Animal Senses. In this book, there are students just like you who investigate how animals use their senses to get information from the environment. Scientists do investigations, too—they try to find out answers to questions about the natural world.

Media embedded March 1, 2021

Ms. Tuxhorn. (2020c, January 6). Handbook of Animal Eyes Book [Video]. YouTube. https://www.youtube.com/watch?v=cKepGFPspdc

Communicate

Post: Pick one to post

After reading the book, which of your ideas have changed. Explain your thinking in a post. If your ideas remained the same, explain how the book supported your ideas.

Or

Choose an animal that the students investigated in the book and answer the questions below.

  • What questions did the students have about this animal?
  • What did the students do to investigate this animal?
  • What did the students find out about this animal?

Create an Update 1

In this unit, you will focus on how animals learn about their environment and how this helps them survive, and we will study this as conservation biologists.

You will reflect on what you might already understand about these ideas. You will write about how a bird gets information from its environment, specifically about where its food is in its environment.

1S-Pre-Unit Writing

Reply

Comment on a classmate's update with your thoughts about their ideas. Do you agree/disagree, and why? Begin your post with @Name, so that your peer knows you are commenting on his or her comment.

Educator

Knowledge Process/Learning Outcomes

Purpose:

Part 1 Purpose: To introduce the unit and allow students to demonstrate their current understanding of how animals use their senses, particularly vision, to survive

Part 2 Purpose: For the class to construct the concept that sound and scent carry information about the environment and that animals have structures whose function is to get this information.

 

Students learn:

Part 1: 

  • Animals use their senses to get information from their environment.
  • Conservation biologists study plants and animals in an environment in order to make sure they are surviving

Part 2:

  • Sound and scent can carry information about the environment to an animal.
  • Animals have different structures that allow them to get information from their environment.

Next Generation Science Standards (NGSS) 3-D Statement

Part 1: Students communicate their initial ideas about how animals use their senses to survive (structure and function).

Part 2: Students communicate their initial ideas about how animals use their senses to survive (structure and function).

NGSS Disciplinary Core Ideas

LS1.A: Structure and Function:

Plants and animals have both internal and external structures that serve various functions in growth, survival, behavior, and reproduction. (4-LS1-1)

LS1.D: Information Processing:

Different sense receptors are specialized for particular kinds of information, which may be then processed by the animal’s brain. Animals are able to use their perceptions and memories to guide their actions. (4-LS1-2)

LS1.A: Structure and Function:

Plants and animals have both internal and external structures that serve various functions in growth, survival, behavior, and reproduction. (4-LS1-1)

LS1.D: Information Processing:

Different sense receptors are specialized for particular kinds of information, which may be then processed by the animal’s brain. Animals are able to use their perceptions and memories to guide their actions. (4-LS1-2)

Common Core State Standards for English Language Arts (CCSS-ELA)

CCSS.ELA-LITERACY.RI.4.7: Interpret information presented visually, orally, or quantitatively (e.g., in charts, graphs, diagrams, time lines, animations, or interactive elements on Web pages) and explain how the information contributes to an understanding of the text in which it appears.

CCSS.ELA-LITERACY.W.4.2: Write informative/explanatory texts to examine a topic and convey ideas and information clearly.

 

Duration

The lesson will take two 60 minute class period to complete.

Resources

Teaching Tip

Students will take a survey to assess their knowledge of the ideas taught in this module. Students will again take the survey at the end of the unit to help you assess their growth.

Before the Lesson : Write on the whiteboard- How do animals use their senses to get information about their environment?

Introduce the unit by saying:

We’re about to begin a new science unit during which we’ll be learning about how animals survive in their environment. We’ve received a message from the Rain Forest Conservation Group, which needs our help with a problem they are trying to solve.

During the lesson

In Part 1 discuss ideas below:

  • What is one kind of information the monkeys can get from their environment? [If there are insects flying around, what kind of fruit it’s eating, how big the river is, how hard the branch is, what other types of animals are nearby, etc.]
  • How do the monkeys get that information? [By hearing the buzz of flying insects, tasting the fish, seeing and tasting the fruit, feeling the branch, smelling the other animals around the river, etc.]
  • Highlight when students bring up a specific sense (sight, hearing, taste, smell, touch) and ask them to say a little more about what that sense is.
  • If students don’t bring up information that could be learned from one of the five senses, invite the class to think about that particular sense.

 

 

Update 2: Explaining How Animals Survive

Learner

Key Concepts:

  • Animals have different structures that allow them to get information from their environment, which helps them survive.
  • Light, sound, and scent can carry information about the environment to an animal.

 

Think About It!

In your science notebook reflect on: Do you think all animals hear, smell, and see in the same way? Why or why not? Make a drawing to help you explain your thinking. Label your drawing.

 

Explore

Part 1: Animal & Plant Senses

In the past update, we have been investigating the question How do animals use their senses to get information about their environment? Yesterday we read about some of the different structures that animals use to get information about their environment. How do some of the animals you read about in the book get information from their environment?

As you watch the videos, think about how each animal or plants gets information from its environment. What structures are they using? What kind of information do they get? How can they use that information to survive?

Animal and Plant Senses Videos

  • Slide 1 Video: Animal Senses—Antelopes
  • Slide 2 Video: Animal Senses—Grizzly
  • Slide 3 Video: Animal Senses—Raccoon
  • Slide 4 Video: Animal Senses—Sidewinder
  • Slide 5 Video: Plants Growing Toward Light

Part 2: Group Work

You will explore a mystery box today with your group in class.

We are going to use a Mystery Box to help us understand more about vision and how it can help an animal get information about its environment. I’d like you to imagine that your food is inside this box. As you work with your box, reflect on what you need in order to get information about what is inside—what color the food is, what shape it is in, or how much of it there is. Thinking about what you need in order to see your food may help you to understand what other animals need in order to see the food they need to survive.

When it is your turn, look through the eyehole of the Mystery Box. What do you see? The boxes must stay flat on a table at all times. Write or draw what you see.

With your group, decide what one thing you will change about the Mystery Box so that you can see what is inside. Make this change, and then look through the hole to find out if you can see what is inside.

 

Communicate

Post

Write a post on one of the videos answering the questions below:

For the animal videos:

  • How did the animal get information about what was in its environment?
  • What structure did it use?
  • How did the information from the environment get to the animal?
  • How will the animal use that information to survive?

For the plant video:

  • How did the plants get information about what was in its environment?
  • How will the plants use that information to survive?
  • Do you think plants have senses?
  • What evidence do you have?
  • How might a plant's ability to move towards light be helpful to a plant's survival?

 

Create an Update 2

You’ve been learning about how animals use their senses to help them survive. Understanding this might give you a clue as to why the Tokay geckos are having trouble surviving. In an update write about your ideas about how senses can help animals get information about their environment and help them survive.

 

Reply

Comment on a classmate's update with your thoughts about their ideas. Do you agree/disagree, and why? Begin your post with @Name, so that your peer knows you are commenting on his or her comment.

Educator

Knowledge Process/Learning Outcomes

Purpose:

  • Part 1: For students to explore the role that certain structures play in animals’ ability to use their senses to gain information about their environment for survival.
  • Part 2: For students to explore a model as an introduction to the importance of light in the ability to see an object.

 

Students learn:

Part 1: Animals and plants have different structures that allow them to get information from their environment, which helps them survive.
Plants have different structures that allow them to grow and reproduce.

Part 2: Light can carry information about the environment to an animal.

 

Next Generation Science Standards 3-D Statement

Part 1: Students obtain information from several videos showing animals sensing their environment by using specialized structures (structure and function).

Part 2: Students use a model to explore the effect of light on vision (cause and effect).

 

NGSS Disciplinary Core Ideas

LS1.A: Structure and Function:

Plants and animals have both internal and external structures that serve various functions in growth, survival, behavior, and reproduction. (4-LS1-1)

LS1.D: Information Processing:

Different sense receptors are specialized for particular kinds of information, which may be then processed by the animal’s brain. Animals are able to use their perceptions and memories to guide their actions. (4-LS1-2)

PS4.B: Electromagnetic Radiation:

An object can be seen when light reflected from its surface enters the eyes. (4-PS4-2)

Common Core State Standards for English Language Arts (CCSS-ELA)

CCSS.ELA-LITERACY.RI.4.7: Interpret information presented visually, orally, or quantitatively (e.g., in charts, graphs, diagrams, time lines, animations, or interactive elements on Web pages) and explain how the information contributes to an understanding of the text in which it appears.

CCSS.ELA-LITERACY.W.4.4: Produce clear and coherent writing in which the development and organization are appropriate to task, purpose, and audience.

 

Duration

The lesson will take one 60 min class period to complete.

 

Resources

Science Notebook

For Each Group of Four Students

  • 1 cardboard box
  • 1 binder clip

 

Teaching Tip

Before the Day of the Lesson-Prepare one Mystery Box for each group of four students (you will need for each group a box, binder clips, and tape).

Assemble the box, taping if necessary.
Place the binder clip in the center of the inside of the box. Tape the binder clip in this position so that it stays in place when the box is moved.
Using the box cutter, cut an eye hole that is about 1” in diameter in one side of the box. (Note: The box cutter should only be used by the teacher; students should not cut the holes.)
Close each box, but do not tape the top closed. Make sure that no light is getting in the box with the top closed and that when you look through the eye hole you cannot see the object inside. If any tiny holes are letting in light, close them using black paper or any opaque tape.
Open the lid of the completed box as you look through the eye hole to test that you can see the object once there is light inside the box. When the box is closed, you should not be able to see anything inside of it.

 

Immediately Before the Lesson-Write the Investigation Question on the board. “How do animals use their senses to get information about their environment?”

Write the reflection questions for the Animal Sense videos on the board:

“How did the animal get information about what was in its environment?”
“What structure did it use?”
“How did the information from the environment get to the animal?”
“How will the animal use that information to survive?”

Further questions you can ask in class-

The antelopes ran away when they heard their predator. If an antelope couldn’t hear well, how could this antelope know when there is a predator nearby?
The raccoon was using its paws to feel for food in the water. If a raccoon couldn’t feel things well, how could this raccoon find its food?

In a separate section of your board, write the reflection questions for the Plant video:

“How did the plants get information about what was in its environment?”
“How will the plants use that information to survive?”

As students are investigating the videos call a group up one at a time to see inside of the box. Let students notice that without light they are unable to see inside the box but with some light they are able to see inside in the box.

During the lesson: Designate groups and distribute boxes.

Have students take turns trying to see what’s in the box without touching it.

As they wait for the other group members to look into the box, students should answer Part 1 in their notebooks.

Once students have all taken a turn looking into their group's box, let the class know that they may proceed to Part 2 in their notebooks.

As students work, circulate to provide support as needed.

Have students reflect on their mystery box experience.

  • What did you see when you first looked through the eyehole? Could you see what was inside? [It was dark and I could not really see well.]
  • What did you need to do in order to see your “food” inside the box? [Light.]
  • What kind of information could you get about the object inside of the box? [You could observe the shape, color, size, and what it is made of. It is small, black and silver, and has metal parts.]
  • What new ideas does this give you about what animals need in order to see their food? [They might need light.]

 

Assessment of Update 2

Informally assess students' understanding of how animals use their senses to get information about their environment.  At this point in the unit, students should be able to demonstrate their understanding that scent and sound carry information from the environment and that animals have sensory structures, such as a nose and ears, to receive that information. Students should be able to make the connection that being able to receive such information is necessary to fulfill the animal’s various needs for survival. Students should be able to identify the different ways in which animals gather information about their environment using different sensory structures. If students are not identifying various senses, redirect them to the videos and ask them to seek evidence to support their thinking. Alternatively, you can lead a discussion to review each sense—what it does and what structures are involved.

Update 3: Investigating Light

Learner

Key Vocabulary

  • environment
  • function
  • investigate
  • observe
  • predator
  • prey
  • sense
  • structure
  • survive
  • variable
  • vision

 

Think About It!

In your science notebook reflect on: Think of a time when you had trouble seeing something. What did you have trouble seeing? What did you do to see it better? Make a drawing to help you explain your thinking. Label your drawing.

 

Explore

(Khan, 2021)

We are not able to investigate animals use light in the classroom.

Use the online simulation to see how the eye of a predator helps them see their prey. 

(Khan, 2021)
  1. Log into your Amlify account and open the Predator Sim
  2. What did you observe when the light is on?
  3. Now turn the light off and observe what happens when the light is off. What did you observe when the light is off?
  4. Restart the Sim. Change the direction of light by dragging the lamp along the track. What did you observe when the light travels in a different direction? What are your ideas now about how light allows a predator to see its prey?
(Khan, 2021)

5. Open the Sim in Recognizing Prey mode.

6. Adjust the light so the predator can see its prey.

7. Observe what happens after the light gets to the predator’s eye.

8. In your notebook, draw a sketch of the image below from the SIM and match the label on the diagram below with the statement that describes what happens at each of the body structures when the predator is able to see its prey.

  • Light, which carries information, enters the predator’s eye through the pupil. This happens at
  • Information from light gets to the light receptors at the back of the predator’s eye. This happens at
  • Information is sent from the light receptors, through the optic nerve, to the brain. This happens at
  • The predator’s brain forms an image of the prey. This happens at
(Amplify, 2016)

9. Watch the video How the Eye Works

Media embedded March 1, 2021

National Eye Institute, NIH. (2016, February 3). The Visual System: How Your Eyes Work [Video]. YouTube. https://www.youtube.com/watch?v=i3_n3Ibfn1c

10. Learn more about your eyes

 

Communicate

Post

Explore the handbook about animal eyes. Read about several of the animals. Pick one animal you read about. Share what you have learned about the way their eye works.

Media embedded March 1, 2021

 

Ms. Tuxhorn. (2020c, January 6). Handbook of Animal Eyes Book [Video]. YouTube. https://www.youtube.com/watch?v=cKepGFPspdc

 

Create Update 3

Now that you’ve read about an animal’s eye, what new ideas do you have about the body structures you’re observing in the Sim? What function do these structures serve?

 

Reply

Comment on a classmate's update with your thoughts about their ideas. Do you agree/disagree, and why? Begin your post with @Name, so that your peer knows you are commenting on his or her comment.

Educator

Knowledge Process/Learning Outcomes

Purpose: For students to familiarize themselves with various structures that are key to animal vision and to begin investigating the role of light in animal vision. Lesson purpose: For students to begin to understand how various structures in an animal’s eye and brain function

Students learn:

  • Light allows an animal to get information from its environment using its eyes.
  • Scientists change one thing at a time during their investigations so they can tell what change makes a difference.
  • Cross-section diagrams allow us to see what is happening inside a structure, such as the eye.

Next Generation Science Standards (NGSS) 3-D Statement

Students use a digital model to investigate how light allows a predator to see its prey (cause and effect, structure and function).

NGSS Disciplinary Core Ideas

LS1.A: Structure and Function:

Plants and animals have both internal and external structures that serve various functions in growth, survival, behavior, and reproduction. (4-LS1-1)

PS4.B: Electromagnetic Radiation:

An object can be seen when light reflected from its surface enters the eyes. (4-PS4-2)

Common Core State Standards for English Language Arts (CCSS-ELA)

CCSS.ELA-LITERACY.RI.4.1: Refer to details and examples in a text when explaining what the text says explicitly and when drawing inferences from the text.

CCSS.ELA-LITERACY.W.4.2.D: Use precise language and domain-specific vocabulary to inform about or explain the topic.

 

Duration

The lesson will take one 60 min class period to complete.

 

Resources

​Science Notebook

 

Teaching Tip

Write the Investigation Question on the board. Write “How does light allow an animal to see something?”

Post question on the classroom wall and lead a discussion to leverage prior knowledge and experiences. Read it aloud.

  • How does light allow a Tokay gecko to see its prey?
  • How does light allow an animal to see something?

As students are working on Sim, you can pose questions as you are walking around the room.

  • What did you observe about light and the information about the prey? [The information about the prey could only reach the eyes of the predator if the light was on.]
  • What one thing did you change that made it either possible or impossible for the predator to see its prey in the first Sim investigation? [I changed the amount of light by turning the light off and on.]
  • How do you know this change made a difference? [It was the only change we made during the investigation and we saw that when we turned off the light, there was a difference in what the animal was able to see.]

 

Update 4: SIM for Vision and Light

Learner

Key Concepts:

  • Light needs to get to an object for an animal to see the object.
  • When scientists change only one variable in an investigation, they can figure out if it makes a difference.

 

Think About It!

In your science notebook reflect on: What are some examples of light sources in your home? Is there a place in your home that is completely dark? How do you know? Make a drawing to help you explain your thinking. Label your drawing.

 

Explore

Part 1- I See What You Mean:

As conservation biologists, you are trying to figure out how light allows a Tokay gecko to find its prey. If you figure that out, you can help the Rain Forest Conservation Group understand why the geckos are not finding their prey and, therefore, not surviving.

Today you will also be reading a book titled, I See What You Mean. This is a book about two kids who are trying to figure out how light allows them see objects. Before reading the book I See What You Mean, read the sentences below. Copy the statements into your notebook. If you agree with the sentence, write an “A” on the line before the sentence. If you disagree with the sentence, write a “D” on the line before the sentence. After you read the book, see if your ideas have changed. Be ready to explain your thinking.

________ All light stops when it reaches an object.

________ Light comes from a source and then floats around.

________ Only shiny things, like spoons and mirrors, reflect light.

________ We see because light reflects off objects and travels to our eyes.

________ Light carries information about objects, such as what color and shape they are.

Answer the questions below in your notebook as you read I See What You Mean

Media embedded March 1, 2021

 

Ms. Tuxhorn. (2020d, January 6). I See What You Mean Book [Video]. YouTube. https://www.youtube.com/watch?v=U9MBUr9hb3U&t=342s

  1. Would Jayla be able to see the peach if light from the lamp traveled straight to her eyes? Why or why not?
  2. Would Zoey be able to see the peach if the lamp in the room were not turned on? Why or why not?
  3. Look at the projection of pages 18–19. Jayla can see the peach because light from the peach travels to her eyes. What kind of information about the peach is this light carrying?

 

Part 2- SIM Exploration:

Use the simulation to explore what factors impacts an animal's ability to see their prey. In the Sim, you can change the

  • amount of light,
  • direction the lamp is pointing,
  • size of the predator’s pupil.

Why would it be important to change one variable at a time in the simulation?

(Khan, 2021)

Communicate

Post

Reflect on SIM learning: Now that you know a little more about how light allows animals to see objects, such as prey, you are going to look closely at a few models that show different ideas about how light can allow animals to see things.

(Amplify, 2016)
(Amplify, 2016)

Use the images above to describe the predator's ability and inability to see its prey. Include a description of the three variables that have changed from the first image to the second.

 

Create Update 4

As conservation biologists, you are working to figure out how light allows animals to see something. Read the statements below:

  • Statement 1: The predator can see its prey when light is turned so that it shines on the prey.
  • Statement 2: The predator can see its prey when light goes into the predator’s eye.

Both of these statements describe when an animal can see its prey, but neither statement is true all the time. In your notebook write about: What makes these statements true? Under what circumstances makes them false? Consider the amount of light, the direction of light, and the pupil size.

 

Reply

Comment on a classmate's update with your thoughts about their ideas. Do you agree/disagree, and why? Begin your post with @Name, so that your peer knows you are commenting on his or her comment.

 

Educator

Knowledge Process/Learning Outcomes

Purpose: For students to model their emerging ideas about how light allows an animal to see something

Students learn:

  • Asking questions, and then reading to find information that helps answer them, helps you understand science text.
  • Light needs to get to an object for an animal to see the object.

Next Generation Science Standards (NGSS) 3-D Statement

Students first use a model to investigate the path of light from a source to an animal’s eyes (structure and function) and then evaluate three models and describe what is wrong about each one.

NGSS Disciplinary Core Ideas

LS1.D: Information Processing:

Different sense receptors are specialized for particular kinds of information, which may be then processed by the animal’s brain. Animals are able to use their perceptions and memories to guide their actions. (4-LS1-2)

PS4.B: Electromagnetic Radiation:

An object can be seen when light reflected from its surface enters the eyes. (4-PS4-2)

Common Core State Standards for English Language Arts (CCSS-ELA)

CCSS.ELA-LITERACY.RI.4.1: Refer to details and examples in a text when explaining what the text says explicitly and when drawing inferences from the text.

CCSS.ELA-LITERACY.W.4.2.D: Use precise language and domain-specific vocabulary to inform about or explain the topic

Duration

The lesson will take two 60 min class period to complete.

 

Resources

Science Notebook

 

Teaching Tip

Before the Lesson: Write the Investigation Question on the board. If the Investigation Question from Lesson 2.1 was erased, rewrite “How does light allow an animal to see something?”

Students use the Vision and Light Simulation to further investigate how light allows an animal to see an object. This activity provides an opportunity for students to change a variable in the Sim and for the teacher to demonstrate the importance of changing one variable at a time.

Critiquing Models with Evidence: Students are presented with three inaccurate models about how light allows animals to see things. Refuting these inaccurate ideas allows students to demonstrate their understanding of how light actually allows an animal to see something.

Update 5: Models for Vision and Light

Learner

Key Concepts:

Light needs to reflect off an object and get to the eye for an animal to see the object.

 

Think About It!

In your science notebook reflect on: Why might it be important to change only one thing at a time when doing an investigation? Make a drawing to help you explain your thinking. Label your drawing.

 

Explore

Part 1: Below is a model of a predator and prey.

(Amplify, 2021)

Below I have documented my thinking that helps me to evaluate Model 1. Notice I added the two circles to help clarify my thinking. 

(Khan, 2020)

Partner Work: Discuss with a partner suggestion for improvements on this model.

If I were to make changes to improve this model, I might make it show a different angle of light so that the light reflects differently off the rabbit. I might also make it show the light reflecting off the rabbit so that it gets into the coyote’s eyes because otherwise, the coyote wouldn’t be able to see the rabbit.

 

A different way I could revise this model, if I didn’t want to change those things, would be to just show the coyote’s thought bubble with no image of the rabbit inside. If the light is not reflecting off the rabbit to the coyote’s eyes, then the coyote wouldn’t see the rabbit.

 

Part 2-Crow Investigation

Read a book about a scientist who wanted to know how one kind of animal, the crow, knows what it’s looking at.  This crow scientist doesn’t investigate how crows recognize their prey—he investigates how crows recognize humans! Questions to consider: How do an animal’s structures allow it to see its prey?

Media embedded March 1, 2021

 

Ms. Tuxhorn. (2020a, January 6). Crow Scientist [Video]. YouTube. https://www.youtube.com/watch?v=Q04J_kuvVJY

 

 Communicate

Post

(Khan, 2021)

Choose either Model 2 or Model 3. Write about how your model is incorrect or incomplete. How could you improve the model?

Create Update 5

Write an explanation to the Rain Forest Conservation Group to help answer their question. How does a Tokay gecko know that it is looking at its prey?

Reply

Comment on a classmate's update with your thoughts about their ideas. Do you agree/disagree, and why? Begin your post with @Name, so that your peer knows you are commenting on his or her comment.

Educator

Knowledge Process/Learning Outcomes

Purpose: For students to apply their growing understanding of the path of light that is needed for an animal to see an object

Students learn:

Part 1:

  • Light needs to reflect off an object and get to the eye for an animal to see the object.
  • Changing more than one variable at a time can make it hard to figure out what made a difference in an investigation.

Part 2: 

  • Light receptors in the eye respond to light and send information to the brain. The brain processes this information to form an image.
  • Animals use information from the environment and memories from the brain in order to determine what they are looking at.
  • After learning something new, scientists often have more questions and new ideas for what they want to investigate

Next Generation Science Standards (NGSS) 3-D Statement

Part 1: Students ask questions as they continue to construct their understanding of how light allows an animal to see something (cause and effect, structure and function).

Part 2: Students ask questions as they continue to construct their understanding of how light allows an animal to see something (cause and effect, structure and function).

NGSS Disciplinary Core Ideas

LS1.A: Structure and Function:

Plants and animals have both internal and external structures that serve various functions in growth, survival, behavior, and reproduction. (4-LS1-1)

LS1.D: Information Processing:

Different sense receptors are specialized for particular kinds of information, which may be then processed by the animal’s brain. Animals are able to use their perceptions and memories to guide their actions. (4-LS1-2)

PS4.B: Electromagnetic Radiation:

An object can be seen when light reflected from its surface enters the eyes. (4-PS4-2)

Common Core State Standards for English Language Arts (CCSS-ELA)

CCSS.ELA-LITERACY.RI.4.1: Refer to details and examples in a text when explaining what the text says explicitly and when drawing inferences from the text.

CCSS.ELA-LITERACY.W.4.2.D: Use precise language and domain-specific vocabulary to inform about or explain the topic

 

Duration

The lesson will take two 60 min class periods to complete.

 

Resources

Student Notebook

 

Teaching Tip

Before the Lesson

Write the Investigation Question on the board. If the Investigation Question from Lesson 2.1 was erased, rewrite “How does light allow an animal to see something?”

 

Critiquing Models with Evidence

Students are presented with three inaccurate models about how light allows animals to see things. Refuting these inaccurate ideas allows students to demonstrate their understanding of how light actually allows an animal to see something

 

Critiquing Models with Evidence-- STUDENT-TO-STUDENT DISCUSSION

Possible Answers: This model is incorrect or incomplete because . . .

• Model 1: . . . it incorrectly shows the path of light from reflecting off the rabbit does not get into the coyote’s eyes

• Model 2: . . . it incorrectly shows the path of light from the lamp to the coyote’s eyes to the rabbit. Based on this model, the coyote should not be able to see the rabbit.

• Model 3: . . . it doesn’t show what happens to the light after it hits the rabbit. Based on this model, the coyote might be able to see the rabbit, but the model is incomplete.

Possible Answers: In order to show what actually happens when an animal sees an object, I would improve this model by . . .

• Model 1: . . . showing the light shining on the rabbit and then reflecting to the coyote’s eyes. The only way for the coyote to see the rabbit is if the light shines on the rabbit first and then reflects to the coyote’s eyes.

• Model 2: . . . showing the light shining on the rabbit and then reflecting to the coyote’s eyes. The only way for the coyote to see the rabbit is if the light shines on the rabbit first and then reflects to the coyote’s eyes.

• Model 3: . . . showing the light reflecting off the rabbit to the coyote’s eyes. The only way for the coyote to see the rabbit is if the light shines on the rabbit first and then reflects to the coyote’s eyes.

Update 6: How Animals React to Info

Learner

Key Concepts:

  • Light receptors in the eye respond to light and send information to the brain. The brain processes this information to form an image.
  • Animals use information from the environment and memories from the brain in order to determine what they are looking at.
  • After learning something new, scientists often have more questions and new ideas for what they want to investigate.
  • After forming an image, the brain compares the image to memories. Then an animal can make a decision that could help it survive.

 

Think About It!

We have explored how an animal’s structures allow it to see its prey. In your science notebook reflect on:

  • What structures allow an animal to see its prey? How do they work together? Why is this important? How do animals know how to react when they get information about their environment?
  • Think about an animal that has an amazing sense of smell or hearing. How do you know it has an amazing sense of smell or hearing?
  • Make a drawing of the animal with labels.

 

Explore

Part 1: You got information about the environment by seeing or hearing it, your brain processing it, and comparing it to memories. You then used the information to decide how to react.

(Amplify, 2016)

Now you will use the Sorting Tool. With your partner, you’ll put cards in order so they explain how light allows a lizard to see and how the lizard knows what it is seeing.

(Amplify, 2016)

Part 2: Seeing Like a Shrimp and Smelling Like a Snake

Let’s read to find out more about how animals sense information about their environment in different ways. Before reading the book Seeing Like a Shrimp and Smelling Like a Snake, read the sentences below. Copy the statements into your notebook. If you agree with the sentence, write an “A” on the line before the sentence. If you disagree with the sentence, write a “D” on the line before the sentence. After you read the book, see if your ideas have changed. Be ready to explain your thinking.

________ All animals have similar kinds of receptors.

________ All animals need to see in order to find their prey.

________ A snake can smell with its tongue.

________ Some animals have a better sense of hearing than other animals.

________ Humans have better senses than other animals.

 

Read the book Seeing Like a Shrimp and Smelling Like a Snake. As you read, think about an animal that has an amazing sense of smell or hearing. How do you know it has an amazing sense of smell or hearing?

Media embedded March 1, 2021

Ms. Tuxhorn. (2020e, January 6). Seeing Like a Shrimp and Smelling Like a Snake Book [Video]. YouTube. https://www.youtube.com/watch?v=uxfxA7u8Af0

 

Communicate

Post: Pick one

After reading the book, which of your ideas have changed. Explain your thinking in a post. If your ideas remained the same, explain how the book supported your ideas.

Or

Choose one animal you read about (star-nosed mole, catfish, fennec fox, snake, or mantis shrimp). Then, return to that section in the book and answer the questions below in your notebook.

  • What sense (touch, taste, hearing, smell, or vision) does the book describe for this animal?
  • What did you learn about this animal’s receptors?
  • How are human senses similar to this animal‘s senses?
  • How are human senses different from this animal‘s senses?

Create Update 6

Write to the Rain Forest Conversation Group and answer the question, How do animals know how to react when they get information about their environment? Specifically tell them your thoughts about the Tokay geckos ability to find their prey.

Other questions to consider:

Would the lizard be able to see the prey if the light was not able to get from the prey into the lizard’s eye? Explain why or why not. How do you think the lizard would react to seeing this insect if it had never seen this type of insect before? Why is seeing and recognizing prey important to the lizard’s survival?

 

Reply

Comment on a classmate's update with your thoughts about their ideas. Do you agree/disagree, and why? Begin your post with @Name, so that your peer knows you are commenting on his or her comment.

Educator

Knowledge Process/Learning Outcomes

Purpose:

Part 1: To provide students with experiences that emphasize the role of the brain and memories in animals’ reaction to information about their environment

Pa:rt 2 To introduce students to the idea that animals process information from their environment in different ways and to have students begin to wonder about the role animals’ receptors play in this variation

Students learn:

Part 1: After forming an image, the brain compares the image to memories. Then an animal can make a decision that could help it survive.

Part 2: Animals can react in different ways to the same amount of information from the environment.
Some animals have a more sensitive sense of hearing, touch, smell, taste, or vision, than other animals.
Different animals have different kinds of receptors.

 

Next Generation Science Standards 3-D Statement

Students use a digital card sort to model their thinking and to reflect on the role of the brain and memories in animals’ reactions to information about their environment (cause and effect, structure and function).

NGSS Disciplinary Core Ideas

LS1.A: Structure and Function:

Plants and animals have both internal and external structures that serve various functions in growth, survival, behavior, and reproduction. (4-LS1-1)

LS1.D: Information Processing:

Different sense receptors are specialized for particular kinds of information, which may be then processed by the animal’s brain. Animals are able to use their perceptions and memories to guide their actions. (4-LS1-2)

PS4.B: Electromagnetic Radiation:

An object can be seen when light reflected from its surface enters the eyes. (4-PS4-2)

Common Core State Standards for English Language Arts (CCSS-ELA)

CCSS.ELA-LITERACY.RI.4.1: Refer to details and examples in a text when explaining what the text says explicitly and when drawing inferences from the text.

CCSS.ELA-LITERACY.W.4.2.D: Use precise language and domain-specific vocabulary to inform about or explain the topic.

 

Duration

The lesson will take one 60 min class period to complete.

 

Resources

Science Notebook

Teaching Tip

Before the Lesson: Write the Investigation Question on the board. Write “How do animals know how to react when they get information about their environment?”

During the lesson. Part 2 Have a discussion on how different animals sense information. Some important ideas and questions to discuss related to receptors:

  • Discuss the receptors (light, touch, taste, scent, or sound) you each read about.
  • How do these receptors help the animal you read about survive? Possible answer: The star-nosed mole has thousands of touch receptors in its nose. The receptors are structures that help it live underground where there is no light.
  • Follow up question How does being very sensitive to touch help the star-nosed mole survive?

Peer Review Project

Learner

Directions:

Today you will construct an explanation of why more light made it hard for the Tokay gecko to see. You will write your response and share it with a peer. They will evaluate your ability to include all the important parts of a CER and you will also evaluate their work. Your teacher will assign you your partner.

Rubric:

Use the CER Peer Review Rubric to provided feedback

Create Update 7

You will revise your work based on the rubric and post your response.

 

End-of-Unit Writing: Explaining Why More Light Makes It Harder for a Tokay Gecko to See

Picture 1 shows the Tokay gecko at night before the highway lights were installed.

Picture 2 shows the Tokay gecko at night after the highway lights were installed. The lights are turned on.

(Amplify, 2016)

Task: Using a CER format, answer How does a Tokay gecko usually see? Why does more light at night make it hard for it to see?

Complete the survey

Take this survey. Please answer the questions as honestly as you can. Click here for the survey.

Educator

Assign Peer Reviewer

Assign a peer reviewer to each student. Students can submit a copy of their work in a Google document to be reviewed by their peers. The peer would use the commenting option to provide feedback and rubric.

 

Assessment

Use the CER Rubric to assess students' final work.

The rubric assesses students’ ability to construct explanations. It is designed to monitor students as they constructing explanations. Students’ explanations (writings and diagrams) should be consistent with the relevant science ideas that they have encountered in the unit. 

Notes on Student Response:

  • Does the explanation go beyond, or add to, what can be observed to explain why more light made it harder for the Tokay gecko to see? Below are possible notes to help with assessments.

 

Beginning

The writing does not go beyond or add to, what was observed to explain why more light made it harder for the Tokay gecko to see.

Possible feedback: You described the Tokay gecko as being able to see better in low light, but how does a gecko see? Why does the amount of light affect an animal’s ability to see?

Approaching 

The writing goes beyond describing that Tokay geckos can see without the highway lights but cannot see with them to propose:

How light allows geckos to see (e.g., the light carries information to the gecko’s eyes, which send information to the brain where it can be processed).

OR

Why the amount of light affects whether or not the geckos can see (e.g., if there is too much light, the gecko’s light receptors can respond too much and the brain can’t form a clear image).

Possible feedback: You gave a partial explanation (e.g., geckos see when light carries information to their eyes, which send information to the brain where it can be processed), but can you explain more fully why the geckos can’t see (e.g., why more light would make it hard for the geckos to see)?

 

Approaching

The writing goes beyond describing that Tokay geckos can see without the highway lights but cannot see with them to propose:

How light allows geckos to see (e.g., the light carries information to the gecko’s eyes, which send information to the brain where it can be processed).

AND

Why the amount of light affects whether or not the geckos can see (e.g., if there is too much light, the gecko’s light receptors can respond too much and the brain can’t form a clear image).

Possible feedback: Is there anything else that could help someone understand why the Tokay gecko cannot see when the highway lights are there?

References

Amplify. (2016, February 11). Amplify | Home. https://amplify.com/

Anderson, K. (2018, January 29). Claim, Evidence, Reasoning (CER): A Writing Strategy to Help Make Connections With Science Concepts and Labs. Model Teaching. https://www.modelteaching.com/education-articles/writing-instruction/claim-evidence-reasoning-cer

Ducksters. (2021a). Biology for Kids: Sight and the Eye. Duksters. https://www.ducksters.com/science/sight_and_the_eye.php

Ducksters. (2021b). Science Quiz: Biology: Sight and the Eye. https://www.ducksters.com/science/quiz/sight_and_the_eye_questions.php

Khan, N. (2021). Vision and Light [Image]. Unpublished Work. The University of Illinois at Urbana Champaign.

Ms. Tuxhorn. (2020a, January 6). Crow Scientist [Video]. YouTube. https://www.youtube.com/watch?v=Q04J_kuvVJY

Ms. Tuxhorn. (2020b, January 6). Handbook of Animal Eyes Book [Video]. YouTube. https://www.youtube.com/watch?v=cKepGFPspdc

Ms. Tuxhorn. (2020d, January 6). I See What You Mean Book [Video]. YouTube. https://www.youtube.com/watch?v=U9MBUr9hb3U&t=342s

Ms. Tuxhorn. (2020e, January 6). Seeing Like a Shrimp and Smelling Like a Snake Book [Video]. YouTube. https://www.youtube.com/watch?v=uxfxA7u8Af0

National Eye Institute, NIH. (2016, February 3). The Visual System: How Your Eyes Work [Video]. YouTube. https://www.youtube.com/watch?v=i3_n3Ibfn1c

Teaching and Learning in Higher Education. (n.d.). RISE Meaningful Feedback Model. Retrieved February 17, 2021, from https://www.queensu.ca/teachingandlearning/modules/assessments/17_s2_09_rise_meaningful_feedback_model.html

Your Amazing Eyes! (2017, February 20). National Geographic Kids. https://uk-origin.natgeokids.com/uk/discover/science/general-science/human-eye/

Vygotskiĭ, L. S., & Cole, M. (1978). Mind in society: The development of higher psychological processes. Cambridge: Harvard University Press.