Level Description Example 1. Organism 2. Population 3. Community 4. Ecosystem 5. Biosphere. Organism Population Community Ecosystem Biosphere

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1 Main Idea: Ecologists study environments at different levels of organization. Write a description of each level of organization in the table. Also, provide an example for each level. Level Description Example 1. Organism 2. Population 3. Community 4. Ecosystem 5. Biosphere An individual form of life, such as a plant, animal, bacterium, protist, or fungus. A group of individuals that belong to the same species and live in the same area. An assemblage of different populaations that live together in a defined area. All the organisms that live in a place together with their physical environment. Our entire planet, all its organisms and physical environments. An individual worker bee. A hive of bees. Bees, birds, clover, trees. Bees, birds, clover, trees, soil, rocks, pond. Earth Fill in the diagram below with the Levels of Organization studied in Ecology. Use the terms from the table above. Organism Population Community Ecosystem Biosphere Main Idea: An ecosystem includes both abiotic and biotic factors. Producers provide energy for other organisms in an ecosystem. Complete the following sentences with the correct term from the list below autotrophs eating nonliving abiotic living temperature moisture plants animals biotic consumers heterotrophs nonliving 6. All ecosystems are made up of living and nonliving components. 7. Biotic factors are living things, such as animals or. plants rocks, water 8. factors Abiotic are nonliving things, such as wind,, temperature or. moisture 9. Autotrophs are organisms that get their energy from nonliving resources, meaning they make their own food. These organisms are also called. 10. Heterotrophs are organisms that get their energy by other eating organisms. These organisms are also called. consumers 1

2 11. Why are so important to an ecosystem? Producers make energy-rich compounds that other organisms need to survive. Producers are essential for the flow of energy through the biosphere. KEY CONCEPT: Food chains and food webs model the flow of energy in an ecosystem. Choose the correct term from the box below to fit each description. carnivore herbivore secondary consumer decomposer detritivore omnivore primary consumer tertiary consumer trophic levels 12. I eat only plants. I am a(n). herbivore (Grasshopper) 13. I eat only other animals. I am a(n). carnivore (Spider) 14. I eat both plants and animals. I am a(n). omnivore (Mouse) 15. I eat dead organic matter. I am a(n). detritivore (Earthworm) 16. I break down organic matter into simpler compounds. I am a(n). decomposer (Mushroom) 17. I am the first consumer above the producer level. I am a(n). primary consumer (Rabbit) 18. I am a carnivore that eats herbivores. I am a(n). secondary consumer (Coyote) 19. I am a carnivore that eats other carnivores. I am a(n) tertiary consumer. (Cougar) 20. The levels of nourishment in a food chain are called. trophic levels 21. How is a food web different from a food chain? Each trophic level in a food chain contains only one organisms, like grass rabbit hawk, in a sequence. In food webs, many different food chains interact with one another to form more complex feeding interactions. 2

3 Complete the Food Chains Worksheet Circle the organisms that complete the food chains below. 3

4 Food Chain Worksheet Read the passages then answer the questions below. The arrows represent the direction of energy flow between organisms. energy source (sun, deep sea vents, chemicals) autotrophs herbivores primary consumers top predator 4

5 Food Web Worksheet Read the passage then answer the questions below. Producers (autotrophs) consumers (heterotrophs) autotrophs a producer (autotroph) herbivores carnivores 5

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