TM Using these slides These slides are visual
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TM Using these slides • These slides are visual aides and are designed to facilitate FOSS investigations in the classroom. They are not intended to replace the FOSS Investigations Guide. • These teaching slides and Guiding the Investigation should be used together. • These slides can be customized to include additional questions, directions, or animations. Slide 1
TM TM Structures of Life Investigation 3, Part 5— Food Chains Slide 2
TM Food Chains What do our crayfish eat? What becomes of the food that a crayfish eats? What eats a crayfish in its natural environment? What might eat the raccoon? Structures of Life, 3. 5: Food Chains Step 1 Slide 3
TM Food Chains Elodea crayfish raccoon coyote A food chain describes a series of feeding relationships between the organisms in an environment. Structures of Life, 3. 5: Food Chains Step 1 Slide 4
TM Focus Question • What is needed to sustain a food chain? Structures of Life, 3. 5: Food Chains Step 2 Slide 5
TM Food-Chain Game The Food-Chain Game involves different populations of organisms. Rules: a. Grasshoppers can feed only on the popcorn plants on the ground. Frogs can feed only on grasshoppers. Hawks can feed only on frogs. b. Animals that are eaten hand over their stomachs to the animal that ate them and wait on the sideline until the next round. c. Several rounds of the game will be played. d. All students must play by the rules and play fairly. plant grasshopper Structures of Life, 3. 5: Food Chains Steps 3– 12 frog hawk Slide 6
TM Outdoor Safety Structures of Life, 3. 5: Food Chains Step 4 Slide 7
TM Sense-Making Discussion Structures of Life, 3. 5: Food Chains Step 14 Slide 8
TM Sustaining a Food Chain What animals are predators in this food chain? What animals are prey? What population sizes of grasshoppers, frogs, and hawks produced a sustainable food chain? What other things helped to sustain this food chain? plant grasshopper Structures of Life, 3. 5: Food Chains Step 14 frog hawk Slide 9
TM Sustaining a Food Chain What might happen if there were only half as many popcorn plants? No plants? If there were no frogs, what might happen to the plant population? The grasshopper population? The hawk population? In real life, do you think one hawk, two frogs, and two grasshoppers is a sustainable food chain? plant grasshopper Structures of Life, 3. 5: Food Chains Step 14 frog hawk Slide 10
TM Sustaining a Food Chain What general rule describes how to sustain a food chain and keep the system stable? If we think back to the food chain with elodea, crayfish, raccoons, and coyotes, how many crayfish do you think it would take to sustain that food chain? Elodea crayfish Structures of Life, 3. 5: Food Chains Step 14 raccoon coyote Slide 11
TM Vocabulary Review food chain a description of the feeding relationships between all the organisms in an environment energy the ability to do work sustain to maintain, keep up, or keep on going population all organisms of one kind that are living together prey an animal eaten by another animal sustainable to be maintained at a certain rate or level Structures of Life, 3. 5: Food Chains Step 15 Slide 12
TM Focus Question • What is needed to sustain a food chain? Structures of Life, 3. 5: Food Chains Step 16 Slide 13
TM Reading in Science Resources Structures of Life, 3. 5: Food Chains Steps 17– 19 Slide 14
TM Investigation 3 Vocabulary Review carapace antenna pincer predator appendage crustacean habitat omnivore herbivore carnivore Elodea behavior Structures of Life, 3. 5: Food Chains Step 20 adaptation offspring environment system territory food chain sustain population stable system prey sustainable Slide 15
TM Wrap-Up In your groups, review the focus questions from Investigation 3. • What are the structures of a crayfish? • How do crayfish structures and behaviors help crayfish survive? • How does variation in traits among individuals of a species affect survival? • What kind of behavior do crayfish display in their habitat? • How are the characteristics of crayfish and other animals alike and different? • What is needed to sustain a food chain? Structures of Life, 3. 5: Food Chains Step 21 Slide 16
TM Investigation Guiding Question • What are characteristics that allow populations of animals to survive and reproduce in an environment? Structures of Life, 3. 5: Food Chains Step 21 Slide 17
TM All rights reserved. Copyright The Regents of the University of California. Developed at TM Photo credits: Cover slide: © Lori Labrecque/Shutterstock Notebook image: © photastic/Shutterstock Published and Distributed by Structures of Life, 3. 5: Food Chains Slide 18
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