Bio Chapter 2 Study Guide
1. Key Terms to Know
 ABIOTIC FACTOR
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BIOTIC FACTOR
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ECOLOGY
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NICHE
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HABITAT
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AUTOTROPH
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HETEROTROPH
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HERBIVORE
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CARNIVORE
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OMNIVORE
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DECOMPOSER
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SCAVENGER
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FIRST ORDER HETEROTROPH (PRIMARY CONSUMER):
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SECOND ORDER HETEROTROPH (SECONDARY CONSUMER):
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THIRD ORDER HETEROTROPH (TERTIARY CONSUMER):
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TROPHIC LEVEL:
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FOOD CHAIN:
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FOOD WEB:
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POPULATION:
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COMMUNITY:
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ECOSYSTEM:

BIOSPHERE:
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ORGANISM:
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PARASITISM:
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COMMENSALISM:
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MUTUALISM:

SYMBIOSIS:
2. Compare and contrast a niche and a habitat
3. Describe how the amount of available energy changes as you move from the
producers to the top predators in a food chain, food web or energy pyramid. EXPLAIN
YOUR ANSWER!
4. Explain what the arrows in a food web or a food chain indicate? Draw a simple food
chain with three tropic levels to illustrate your explanation.
5. Compare and contrast a population, a community, and an ecosystem.
6. Be able to identify the autotrophs/producers, and the heterotrophs (specifically
carnivores, herbivores, omnivores) from a food web.