Chapter 3 Review

3-1 Review Answers

1. Ecology 2. Land, water, air 3. Web of interdependence 4. individual, populations, communities, ecosystems, biomes, and biosphere

3-1 Review Answers

5. Species6. Population 7. Community 8. Ecosystem 9. Biome 10. Observing, Experimenting, & Modeling

3-2 Review Answers

11. Its need for energy to power life’s processes12. Sunlight 13. Inorganic chemical compounds 14. Producers15. Photosynthesis 16. Chemosynthesis 17. Consumers

3-2 Review Answers

18. Plants19. Animals 20. Plants and animals 21. Organic matter22. Trophic level 23. Producers

consumers

3-2 Review Answers

24. ecological pyramid three types: energy pyramid, biomass

pyramid, & pyramids of numbers

25. 10%

#20 worksheet page 31

100% Producers

10% First level Consumers

1% Second Level Consumers

0.1% Third Level Consumers

Source of energy: sunlight or chemical energy

3-3 Review Answers

1. oxygen, carbon, hydrogen, and nitrogen 2. Matter is recycled within and between

ecosystems3. Matter moves as elements, chemical

compounds, and other formsMatter moves in biogeochemical cycles

3-3 Review Answers

4. biological, geological, and chemical aspects of the biosphere.

• What makes up the biosphere? • Land, water, and air

3-3 Review Answers

5. Evaporation 6. a, b, and c or precipitation, evaporation, and

run off 7. nutrients- all the chemical substances that an organisms needs to sustain life 8. Carbon cycle

nitrogen cycle phosphorus cycle

3-3 Review Answers

9. Due to its many roles- Carbon is a key ingredient of living tissues & is a component of animal skeletons & rocks. It is in the atmosphere as carbon dioxide gas & is involved in photosynthesis. 10. Atmosphere

oceansunderground

3-3 Review Answers

11. Photosynthesis 12. To make amino acids, which make proteins 13. Bacteria convert nitrogen gas into ammonia 14. Bacteria convert nitrates into nitrogen gas 15. It releases nitrogen into the atmosphere once again

3-3 Review Answers

16. A & B are true 17. Because it forms part of important life-sustaining molecules such as DNA & RNA. 18. The rate at which organic mater is created by producers19. It will limit an organisms growth

3-3 Review Answers

20. When an ecosystem is limited by a single nutrient that is scarce or cycles very slowly.

21. There are more nutrients available so the producers grow and reproduce more quickly. If there are not enough consumers (to eat the algae) there will be excess algae.

Review Questions

1. All of life on Earth exists in a region known as the _____________

biosphere 2. Groups of different species that live together in a defined area make up a

community

Review Questions

3. Autotrophs are organisms that Use energy they take in from the environment to

convert inorganic matter into complex organic molecules4. Nutrients move through an ecosystem in

biogeochemical cycles 5. When an ecosystem is limited by a single nutrient that either is scare or cycles very slowly, this substance is called a(an)

Limiting nutrient

Review Questions

Pond Plant -> Snail -> Turtle 6. In the following food chain, which organism is an autotroph? pond plant 7. What amount of energy is available for the Snail?

10% 8. The turtle is an example of a _________.

consumer

Review Questions

9. Run-off from a farm adds large amounts of nitrogen and phosphorus to a nearby pond. The algae in the pond quickly grow and reproduce creating a(an)

algal bloom 10. The biosphere contains all of the following

land, air, water

Review Questions

11. What links together all of the food chains in an ecosystem?

food web 12. What is the process called in which water changes from a liquid to a gas

evaporation 13. What are the main nutrient cycles?

carbon, nitrogen, and phosphorus

Review Questions

Autotrophs are also called producers

Heterotrophs are also called consumers

Make sure to Study Vocabulary- Vocabulary Review