Developing a Model to Describe the Movement of Matter Among Plants, Animals, Decomposers, and the Environment

When animals break down glucose to create energy, they release water and carbon dioxide (CO2.) How can carbon dioxide (CO2) be reused within the food web?

• It can be used by animals as a source of oxygen.

• It can be used by both plants and animals to produce energy.

• It can be used by plants during photosynthesis to create glucose.

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NGSS.MS-LS1-6

NGSS.MS-LS2-3

Which group in a food web is most likely to change atmospheric nitrogen into forms that are usable?

• consumers

• decomposers

• producers

• scavengers

Which best explains the role of bacteria in an ecosystem?

• They break down organic matter into necessary nutrient components.

•  They release energy from the decomposition of atmospheric gases.

• They convert carbon dioxide and water into simple carbohydrates.

• They absorb energy from the synthesis of inorganic compounds.

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NGSS.MS-LS2-3

Which molecule is necessary in order for respiration to occur in plants and animals?

• nitrogen

• oxygen

• sulfur

• water

Which best describes the role plants serve in the oxygen cycle?

• They absorb oxygen during photosynthesis.

• They absorb oxygen during decomposition reactions.

• They release oxygen as a waste product of photosynthesis.

• They release oxygen as a waste product in cellular respiration.

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NGSS.MS-LS1-6

Which of the following is an example of a biotic factor in an ecosystem?

• sunlight

• stream

• rock

• tree

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NGSS.MS-LS2-4

Most producers get energy from the Sun using the process of

• cellular respiration

• chemosynthesis

• photosynthesis

• consumption

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NGSS.MS-LS1-6

Decomposers are important to ecosystems because they

• return vital nutrients to the ecosystem

• capture energy from the Sun

• are producers

• can be omnivores

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NGSS.MS-LS2-3

A consumer gets energy by

• absorbing sunlight.

• breaking down dead organisms.

• soaking it up from the ground.

• feeding on other organisms.

The cycling of matter is important because

• Matter can be created and destroyed

• Only a limited amount of matter is available so it has to be recycled

• Matter can only be found in a solution

• Bacteria use matter to convert organisms into solar energy

Tags

NGSS.MS-LS1-6

NGSS.MS-LS2-3