Understanding Earth's Biogeochemical Cycles

What is the primary reason the Earth is considered a closed system in terms of matter?

• Because matter cannot leave the Earth's atmosphere

• Due to the conservation of energy principle

• Due to the gravitational pull of the Earth

• Because all matter is recycled within Earth's biogeochemical cycles

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NGSS.HS-LS2-5

Which process describes the conversion of a liquid into a gas?

• Deposition

• Evaporation

• Condensation

• Sublimation

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NGSS.MS-PS1-4

What drives the hydrologic cycle?

• Solar energy and wind

• The movement of the Earth's crust

• Tidal forces from the moon

• Magnetic fields of the Earth

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NGSS.MS-ESS2-4

What is the primary form of water in clouds?

• Gas

• Plasma

• Solid

• Liquid

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NGSS.MS-ESS2-4

What role do oceans play in the hydrologic cycle?

• They generate most of the Earth's oxygen

• They act as reservoirs for carbon dioxide

• They are the primary source of evaporation

• They store thermal energy from the sun

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NGSS.MS-ESS2-4

Which process in plants involves the release of water vapor into the atmosphere?

• Respiration

• Photosynthesis

• Transpiration

• Condensation

What is the main driver of evaporation in the hydrologic cycle?

• Ocean currents

• Solar energy

• Geothermal heat

• Atmospheric pressure changes

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NGSS.MS-ESS2-4

How do plants contribute to the carbon cycle?

• They convert carbon dioxide into oxygen during respiration

• They release oxygen into the atmosphere

• They absorb carbon dioxide for photosynthesis

• They store carbon in their roots

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NGSS.MS-LS1-6

NGSS.MS-LS2-3

What is a major consequence of burning fossil fuels?

• Decrease in atmospheric nitrogen

• Increase in atmospheric oxygen

• Reduction in solar radiation

• Increase in atmospheric carbon dioxide

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What is the significance of permafrost in the carbon cycle?

• It absorbs more carbon dioxide than it releases

• It reflects solar radiation, reducing global warming

• It acts as a permanent carbon sink

• It stores large amounts of carbon that can be released upon melting

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NGSS.HS-ESS2-2

NGSS.HS-ESS2-6