Cycles in Nature: Nitrogen, Carbon, Water

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What is the water cycle?

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The water cycle is the continuous movement of water on, above, and below the surface of the Earth, involving processes like evaporation, condensation, precipitation, and infiltration.

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What is the carbon cycle?

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The carbon cycle is the process by which carbon atoms move between the atmosphere, land, water, and living organisms, involving processes like photosynthesis, respiration, and decomposition.

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What is the nitrogen cycle?

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The nitrogen cycle is the process through which nitrogen is converted between its various chemical forms, moving from the atmosphere to the soil and living organisms and back again.

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NGSS.MS-LS2-3

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What role do bacteria play in the nitrogen cycle?

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Bacteria 'fix' nitrogen in the soil, converting it into forms that plants can absorb and use.

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NGSS.MS-LS2-3

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How do fossil fuels form in the carbon cycle?

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Fossil fuels form from decomposing plant and animal matter that is subjected to heat and pressure over millions of years.

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What is evaporation in the water cycle?

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Evaporation is the process by which water changes from a liquid to a gas (water vapor) due to heat.

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NGSS.MS-ESS2-4

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What is condensation in the water cycle?

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Condensation is the process by which water vapor cools and changes back into liquid water, forming clouds.

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What is precipitation in the water cycle?

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Precipitation is any form of water, such as rain, snow, sleet, or hail, that falls from clouds to the Earth's surface.

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NGSS.MS-ESS2-4

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What is photosynthesis in the carbon cycle?

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Photosynthesis is the process by which green plants use sunlight to convert carbon dioxide and water into glucose and oxygen.

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What is respiration in the carbon cycle?

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Respiration is the process by which living organisms convert glucose and oxygen into energy, releasing carbon dioxide back into the atmosphere.

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