9th-3:2 Energy, Producers and Consumers

Plants are

• primary producers.

• primary consumers

• omnivores

• herbivores

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The algae at the beginning of the food chain in Figure 3–1 are

• primary producers

• primary consumers.

• heterotrophs.

• decomposers

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How do most primary producers make their own food?

• by using chemical energy to make carbohydrates

• by changing water into carbon dioxide

• by breaking down remains to make carbon dioxide

• by using light energy to make carbohydrates

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Which of the following organisms does NOT require sunlight to live?

• algae

• trees

• photosynthetic bacteria

• chemosynthetic bacteria

Compared to land, the open oceans

• contain unlimited nitrogen.

• are nutrient-poor environments.

• are rich in silica and iron.

• are nutrient-rich environments.

In what way are herbivores and carnivores alike?

• They both use photosynthesis to make their own food.

• They both obtain energy by consuming other organisms.

• They both directly consume producers.

• They both are considered to be autotrophs.

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What animals eat both producers and consumers?

• chemotrophs

• autotrophs

• omnivores

• herbivores

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A bird stalks, kills, and then eats an insect. Based on its behavior, which pair of ecological terms describes the bird?

• producer, heterotroph

• carnivore, consumer

• autotroph, herbivore

• herbivore, decomposer

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NGSS.MS-LS2-2

A word that means the same thing as consumer is

• producer

• autotroph

• heterotroph

• carbohydrate.

Organisms need nutrients in order to

• carry out essential life functions

• recycle chemical compounds

• carry out nitrogen fixation.

• utilize hydrogen and oxygen

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