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. Species
6. Population
7. Community
8. Ecosystem
9. Biome
10. Observing, Experimenting, & Modeling
3-2 Review Answers
11. Its need for energy to power life’s processes
12. Sunlight
13. Inorganic chemical compounds
14. Producers
15. Photosynthesis
16. Chemosynthesis
17. Consumers
3-2 Review Answers
18. Plants
19. Animals
20. Plants and animals
21. Organic matter
22. 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
0.1% Third
Level Consumers
1% Second Level
Consumers
Source of energy: sunlight
or chemical energy
10% First level
Consumers
100%
Producers
3-3 Review Answers
1. oxygen, carbon, hydrogen, and nitrogen
2. Matter is recycled within and between
ecosystems
3. Matter moves as elements, chemical
compounds, and other forms
Matter 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 rolesCarbon 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
oceans
underground
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 lifesustaining molecules such as DNA & RNA.
18. The rate at which organic mater is created by
producers
19. 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
molecules
4. 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 VocabularyVocabulary Review