Weather and Water Cycle Concepts

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Water Cycle

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The cycle of processes by which water circulates between the earth's oceans, atmosphere, and land, involving precipitation as rain and snow, drainage in streams and rivers, and return to the atmosphere by evaporation and transpiration.

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Evaporation

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The change of a substance from a liquid to a gas, a process that puts water into the atmosphere.

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Transpiration

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Evaporation of water from the leaves of a plant.

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Condensation

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The change of state from a gas to a liquid, like what happens to form clouds.

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Precipitation

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Any form of water that falls from clouds and reaches Earth's surface.

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Runoff

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Water that flows over the ground surface rather than soaking into the ground.

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Groundwater

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Water held underground in the soil or in pores and crevices in rock.

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Infiltration

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Downward movement of water through soil.

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Weather

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The condition of Earth's atmosphere at a particular time and place.

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Climate

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The average weather conditions in an area over a long period of time.