Food Chain & Food Web Lab 8 PDF

Name _______________________________________Teacher ___________________________________MOD________ Lab 8: What are Some Parts of a Food Chain and a Food Web? OBJECTIVES: Producer Seeds Primary consumer sparrow Second consumer Hawk > Determine what different animals eat in several food chains....

Name _______________________________________Teacher ___________________________________MOD________ Lab 8: What are Some Parts of a Food Chain and a Food Web? OBJECTIVES: Producer Seeds Primary consumer sparrow Second consumer Hawk > Determine what different animals eat in several food chains. > Build a food web that could exist in a forest ecosystem. Background Materials: • Colored Pencils • Metric Ruler Plants use the light energy of the sun to make food. The food is stored in the cells of the plant. Plants are called producers because they make food. Some of the stored energy in the food that plants make is passed on to the animals that eat the plants. Plant-eating animals are called primary consumers. Some of the energy is passed on to the animals that eat primary consumers. Animals that eat other animals are called secondary consumers. The pathway that food energy takes through an ecosystem is called a food chain. A food chain shows the movement of energy from plants to plant eaters and then to animals eaters. An example of a food chain is shown above. Some of the food energy in the seeds moves to the sparrow that eats them Some of the food energy then moves to the hawk that eats the sparrow. Because a hawk eats animals other than sparrows, you could make a food chain for each animal the hawk eats. If all the food chains were connected, the result is a food web. A food web is a group of connected food chains. A food web shows many energy relationships. Vocabulary Define the following vocabulary: Consumer ________________________________________________________________________ Food Chain _______________________________________________________________________ Food Energy ______________________________________________________________________ Food Web ________________________________________________________________________ Producer ________________________________________________________________________ Procedure Part A: Examining Food Chains Primary Consumer Producer Secondary Consumers Plant roots → rabbit → fox Plant seed → mouse → fox Plant leaves → earthworm → robin Plant leaves → rabbit → snake Plant leaves → cricket → Plant stems → earthworm Plant stems → Plant stems → snake robin → fox → snake → hawk rabbit → hawk → small insects → mouse → owl Plant leaves → rabbit → owl → fox Plant leaves → cricket → mouse → hawk Plant fruit → mouse → snake → owl Plant fruit → small insects → robin → snake → fox 2. Answer the following questions: A. List the organisms that you think are producers?___________________________________ B. Why are they called producers? _________________________________________________ C. List the organisms that you think are primary consumers. ___________________________ _____________________________________________________________________________ D. Why are they called primary consumers ?_________________________________________ E. List the organisms that you think are secondary consumers__________________________ ____________________________________________________________________________ F. Why are they called secondary consumers? _______________________________________ G. Herbivores are organisms that eat plants. List the herbivores in the food chains. _____________________________________________________________________________ H. How does your list of herbivores compare with your list in question C? _____________________________________________________________________________ I. Carnivores are organisms that eat other animals. List the carnivores in the food chains. ______________________________________________________________________________ J. How does your list of carnivores compare with your list in question E? ___________________ ______________________________________________________________________________ K. Make two food chains using animals not listed in the above food chains. Part B Making a Food Web 1. Use the information in Part A on the previous page to complete Figure 1. 2. Draw lines from each organism to other organisms that eat it. 3. Show which organism gets the energy by making an arrow pointing in the direction of energy flow from producers to primary consumers, to secondary consumers. One food chain has already been done for you. 4. Draw your lines with different colored pencils for different food chains. To make it easier to read when finished, do not draw through the circles. FIGURE 1 Cricket Small Insects Robin Earthworm Plant Parts Mouse Snake Rabbit Hawk Owl Fox Questions 1. How many of the food chains you made in Figure 1 include the following animals? Hawk ______________ Earthworm ____________ Small Insects ______________ Owl ____________ Fox ______________ Snake _____________ 2. How many of the food chains include plant parts? _______________________ 3. Give the names of the producers that are in the food web. _____________________ 4. Give the names of the consumers that eat both plants and animals. __________________________ ___________________________________________________________________________________ 5. What would happen to the food web if all the plants were removed? _________________________ ___________________________________________________________________________________ Explain your answer __________________________________________________________________ 6. What might happen to the owl population if there were less rabbits, mice, and snakes in a certain year? _____________________________________________________________________________ 7. What organisms will be affected if crickets, small insects, and earthworms are killed by pesticides? ____________________________________________________________________________________ ____________________________________________________________________________________ 8. Draw three food chains below that can be connected in a food web. Show producers and consumers that you might see in your backyard or on your way to school.