Exploring Cycles of Matter in Earth Science

What does it mean when we say Earth is a closed system?

• Matter cycles within Earth but does not leave the system.

• Earth is isolated from the universe.

• No energy enters or leaves Earth.

• Earth's atmosphere is completely sealed.

Which process in the carbon cycle involves plants taking in carbon dioxide?

• Decomposition

• Respiration

• Combustion

• Photosynthesis

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What is the primary way that carbon dioxide returns to the atmosphere from animals?

• Through eating plants

• Via photosynthesis

• Through respiration

• By decomposition

What is the first stage of the nitrogen cycle called?

• Mineralization

• Denitrification

• Fixation

• Nitrification

How do animals primarily acquire nitrogen?

• Through water

• Direct absorption from soil

• By breathing air

• Consuming plants

Which cycle does not typically involve the atmosphere?

• Nitrogen cycle

• Carbon cycle

• Water cycle

• Phosphorus cycle

What is the main way phosphorus enters the soil?

• Through animal waste

• From weathered rocks

• Through atmospheric deposition

• Via plant decay

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What is the process called when water vapor turns back into liquid water?

• Precipitation

• Collection

• Condensation

• Evaporation

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During which process does water return to Earth's surface from the atmosphere?

• Condensation

• Evaporation

• Precipitation

• Collection

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What role does water play in the biosphere?

• It is essential for all life

• It is not necessary for life

• It only affects the atmosphere

• It is a minor component

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