3. Prefixes Auto- Self Hetero- Different Homo- Same Photo- Light Chemo- Chemical Herbi- Plants Carni- Meat Omni- All Hydro- Water
4. Producers provide energy for other organisms in an ecosystem. Name three producers. Producers get their energy from non-living resources. Producers are also called autotrophs because they make their own food.
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6. KEY CONCEPT Food chains and food webs model the flow of energy in an ecosystem.
7. DESERT COTTONTAIL GRAMA GRASS HARRIS’S HAWK A food chain is a model that shows a sequence of feeding relationships. Why does “chain” fit this idea? A food chain links species by their feeding relationships. A food chain follows the connection between one producer and a single chain of consumers within an ecosystem.
8. Create your own food chain Beginning with a producer and including at least three organisms, give an example of a food chain.
19. precipitation condensation transpiration evaporation surface runoff lake water storage in ocean groundwater seepage Water cycles through the environment. Explain how. The hydrologic, or water, cycle is the circular pathway of water on Earth. Organisms all have bodies made mostly of water.
20. Elements essential for life also cycle through ecosystems. Name one. A biogeochemical cycle is the movement of a particular chemical through the biological and geological parts of an ecosystem.
26. Phosphorus leaches into groundwater from the soil and is locked in sediments.
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29. How do the activities of a keystone species affect the biodiversity of an ecosystem? A. They increase biodiversity. B. They decrease biodiversity. C. They have no effect on biodiversity. D. Biodiversity remains the same but the species change. Correct Answer = A Which is a characteristic of an ecosystem in approximate equilibrium? A. The kinds of organisms do not change. B. Biotic factors do not change. C.Abiotic factors do not change. D. The total number of organisms do not change.
30. How do the activities of a keystone species affect the biodiversity of an ecosystem? A. They increase biodiversity. B. They decrease biodiversity. C. They have no effect on biodiversity. D. Biodiversity remains the same but the species change. Correct Answer = A Which is a characteristic of an ecosystem in approximate equilibrium? A. The kinds of organisms do not change. B. Biotic factors do not change. C.Abiotic factors do not change. D. The total number of organisms do not change. Correct Answer = D