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Populations and Ecosystem

Dive into the fascinating world of populations and ecosystems in this comprehensive review. Understand consumer roles, energy flow, and nutrient cycles through engaging questions and answers.

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Populations and Ecosystem

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  1. Populations and Ecosystem Chapter 2 Review

  2. 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

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

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

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

  6. 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

  7. 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

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

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

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

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

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

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

  14. 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?

  15. ANSWER KEY • 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 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 C D A B

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