Energy and Matter

The organisms at the bottom level of the food chain are called

• primary producers

• primary consumers

• predators

• heterotrophs

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NGSS.MS-LS2-3

Autotrophs are organisms that

• eat themselves

• produce their own food

• eat other plants and organisms for food

• are single-celled

The process of cellular respiration is how organisms

• breathe

• get chemical energy from food molecules

• get energy from the sun

• use chemical energy to break down food molecules

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The products of cellular respiration are

• carbon dioxide and oxygen

• oxygen

• carbon dioxide and water

• carbon dioxide

Anaerobic respiration occurs when

• No oxygen is present

• No carbon dioxide is present

• No water is present

• doesn't occur

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NGSS.MS-LS1-7

Cellular respiration is an

• endothermic process

• exothermic process

• isothermic process

• introthermic process

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NGSS.MS-PS3-5

In humans, excess calories that are consumed are converted to fat molecules and stored in fat cells.

• True

• False

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NGSS.MS-LS1-7

Why do ecosystems rarely contain more than a few trophic levels?

• Energy transfer efficiency is high

• Energy transfer efficiency is low

• Energy amounts remain constant

• Energy cannot flow through levels

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NGSS.MS-LS2-3

The carbon (in the carbon dioxide) that we breathe out has come originally from our

• Cells

• Skin

• Blood

• Food

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NGSS.MS-LS2-3

The correct name for this piece of lab equipment is

• Triangular beaker

• Volumetric flask

• Erlenmeyer flask

• Graduated cylinder