👩‍🏫 Teacher’s Guide

Objective
Students will classify animals as predators, prey, or both; interpret simple predator–prey diagrams; and explain what might happen when one part of a food chain changes.

Vocabulary
food chain, food web, herbivore, omnivore, scavenger, adaptation, competition, territory

Teaching Notes

• Begin with a quick picture sort: show or name animals and ask students to stand for “predator,” sit for “prey,” or show both hands for “both.”
• Draw two overlapping circles labeled Predators and Prey to model a Venn diagram. Place animals that can be both (like snakes or foxes) in the middle.
• Challenge students to explain their choices using evidence: teeth shape, speed, camouflage, or known behavior.
• Connect to math and graphs by talking about how animal populations can go up and down over time.

🧒 Student Worksheet

Concept and Helping Material

Definition. A food chain shows how energy moves from one living thing to another as one organism eats another. Many food chains connect to form a food web. Some animals are mostly herbivores (eat plants), some are carnivores (eat animals), and some are omnivores (eat both).

Helping ideas and samples:

• Start with the sun and an example plant, then add a plant-eater and a predator to build a simple food chain.
• Use arrows to show the direction of energy: grass → rabbit → fox.
• Decide where to place an animal in a Venn diagram: only predator, only prey, or both.
• Safety note: When we model food chains in class, we use cards, drawings, or objects—not real animals.

Vocabulary and Definition

• — a model that shows who eats whom in a line of living things
• — many food chains that are connected in one ecosystem
• — an animal that mainly eats plants
• — an animal that eats both plants and animals
• — an animal that eats dead animals it finds
• — a body part or behavior that helps an animal survive
• — when two or more organisms want the same resource
• — an area an animal defends as its own living space

Words to Learn

, , , , , , ,

Sentences to Fill In

1. A diagram that shows how energy moves from grass to a rabbit to a hawk is a .
2. Many linked food chains in one pond or forest form a .
3. A deer that eats leaves and grass is a .
4. A bear that eats berries and fish is an .
5. A vulture that feeds on animals that are already dead is a .
6. Sharp claws are an that helps a predator catch prey.
7. When two hawks both try to nest in the same tree, they are in .
8. A wolf pack may chase away other wolves that enter their .

Think & Respond Q&A

1. Can one animal be both a predator and prey? Give an example.
2. In the food chain grass → grasshopper → frog → snake, which organism is both predator and prey?
3. What might happen to rabbits if most foxes in an area disappear?
4. What might happen to plants if there are suddenly many more rabbits and the same number of foxes?
5. How could adding a new predator to an ecosystem cause competition?
6. Why is it better to think of a food web instead of only one food chain?
7. How might losing part of a wetland habitat harm a food web?
8. How do prey animals sometimes “win” against predators?
9. What is one question you still have about predators and prey?
10. How could you show predator–prey relationships using a Venn diagram?

Hands-On Experiment or Activities

Changing Populations Simulation

What You Need:
Counters or small objects in two colors, one die, and a recording chart.

What You Do:

1. Let one color stand for prey and the other for predators. Start with many prey and a few predators.
2. Roll the die each “year” to decide what happens (for example, 1–3: prey have a good year and add more; 4–6: predators have a good year and add more).
3. After each roll, adjust the numbers and record them on the chart.
4. Continue for several “years,” then graph the changes in predator and prey populations.

Think and Talk:
What changed? What stayed the same?

Reflection

• How did the simulation help you understand real predator–prey relationships?
• Why is it important to protect whole habitats instead of just one favorite animal?
• If you could study one predator or prey animal in the wild, which would you choose and why?