Unit 4 - Food Webs & Ecological Relationships

Which definition best describes a producer?

• an organism that captures energy from sunlight through a process called photosynthesis

• an organism that breaks down organic material and feeds on the nutrients

• an organism that eats other organisms

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Which definition best describes a consumer?

• an organism that captures energy from sunlight through a process called photosynthesis

• an organism that breaks down organic material and feeds on the nutrients

• an organism that eats other organisms

Which definition best describes a decomposer?

• an organism that captures energy from sunlight through a process called photosynthesis

• an organism that breaks down organic material and feeds on the nutrients

• an organism that eats other organisms

Which organism is a producer?

• human

• heron

• cattail

• crab

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Which organism is a primary consumer?

• raccoon

• small fish

• duck

• human

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Which organisms are secondary consumers? Select all that apply.

• raccoon

• small fish

• duck

• human

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Which organism is a tertiary consumer?

• raccoon

• small fish

• duck

• human

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What is missing from this food web?

• producers

• consumers

• decomposers

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Which two organisms have a competitive relationships?

• large fish + crab

• human + duck

• raccoon + heron

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The small fish has a competitive relationship with the ___.

• crab

• duck

• cattail

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