Populations and Ecosystem

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Presentation transcript:

Populations and Ecosystem Chapter 2 Review

DIRECTIONS Each slide is numbered. Number your paper as you complete each slide Some questions are multiple choice and some are extended response The answer key is on the last page Grade your review sheet Have your parent/guardian sign your notebook paper

1. What kind of consumers are most humans? A. Herbivores B. Omnivores C. Predator D. Carnivores

2. If a prey population decreases, the predator population will usually ______________. Why?

3. In the nitrogen cycle, what is converted to a usable form? A. Nitrogen gas B. Carbon dioxide C. Nitrogen compounds D. Oxygen

4. In the nitrogen cycle, which organisms get the nitrogen straight from the atmosphere? A. Humans and Horses B. Bacteria growing on the roots of plants C. Worms and snails D. Dead plants and animals

5. The flow of energy from one organism to another is called.. A. The nitrogen cycle B. food web C. A parasite-host relationship D. A food chain

6. What compounds act as the building blocks of living things? A. Proteins B. Sugars C. Carbon dioxide D. Food

7. What process breaks down carbon compounds in the carbon dioxide-oxygen cycle? A. Cell Respiration B. Nitrogen fixing C. Photosynthesis D. Condensation

8. Overlapping food chains form A. First order consumers B. Omnivores C. Ecosystems D. Food Webs

9. What is the process by which water vapor is changed to liquid water? A. Condensation B. Evaporation C. Precipitation D. Transpiration

10. When the predator population decreases, the prey population will usually ______________. Why?

11. The process by which liquid water changes to water vapor is … A. Condensation B. Evaporation C. Precipitation D. Transpiration

12. Place the letter of each member of the food chain into the correct spot of the energy pyramid. A. Cricket B. Grass C. Hawk D. Small bird 13. What organism has the MOST amount of energy in this pyramid? 14. What organism has the LEAST amount of energy in this pyramid?

ANSWER KEY 1. B 2. decrease, because there aren’t enough prey to eats so the predators could starve to death 3. A 4. B 5.D 6.A 7.A D A increase, because there aren’t enough predators to eat the prey, so the prey will live longer and reproduce more 11. B 12. 13. grass 14. hawk C D A B