Download Chapter 18 Test Review (Question, followed by answer) An _____ is

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Chapter 18 Test Review
(Question, followed by answer)
1. An _____ is any living thing in an environment.
2. A series of overlapping food chains makes up a _____.
Food web
3. The size of the population that occupies an area of definite size is its _____.
Population Density
4. Where an organism lives in an ecosystem is its _____
5. The part of Earth that supports life is the _____
6. Any close relationship between two or more species is _____
7. Which of the following is a model that shows the amount of energy available as it
flows through an ecosystem?
Energy Pyramid
8. Which of the following is a biotic factor?
9. What is made up of all populations in an area?
10. What is the term for the total number of individuals in a population occupying a
certain area?
11. What is the a tree an example of?
12. Which level of the food chain has the most energy?
13. What is the symbiotic relationship called in which one organism is helped and the
other is harmed?
14. Which of the following is NOT cycled in the biosphere?
15. What are coral reefs, forest, and ponds examples of?
16. What are all of the individuals of one species that live in the same area at the same
time called?
17. Why does each level of the energy pyramid smaller than the one below it.
The amount of energy available to a consumer decreases at each level with the
greatest amount available at the bottom.
18. Compare and contrast the roles of producers, consumers, and decomposers.
Producers capture and transfer the sun’s energy into chemical energy. Consumers get
energy by eating on producers or other consumers, and Decomposers obtain energy
from the remains of organisms.
20. Infer why decomposers are vital to the ecosystem.
They break down dead organisms and make the nutrients contained in the organisms
bodies available for plants to use.