Hydrologic Cycle the Water Cycle THE WATER CYCLE

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Hydrologic Cycle “the Water Cycle”

Hydrologic Cycle “the Water Cycle”

THE WATER CYCLE • The continuous process by which water moves through the living

THE WATER CYCLE • The continuous process by which water moves through the living and nonliving parts of the environment

• In the water cycle, water moves from bodies of water, land, and

• In the water cycle, water moves from bodies of water, land, and living things on Earth’s surface to the atmosphere and back to Earth’s surface.

• Just like in the rock cycle, water can take any pathway through

• Just like in the rock cycle, water can take any pathway through the cycle.

Sources of energy in the Water Cycle • Almost entirely driven by Solar radiation

Sources of energy in the Water Cycle • Almost entirely driven by Solar radiation (heat from the sun) • Influenced by gravity (Potential and Kinetic energy)

Steps in the water cycle EVAPORATION • Molecules at the surface of a liquid

Steps in the water cycle EVAPORATION • Molecules at the surface of a liquid absorb enough energy to change to the gaseous state. • Evaporation over the ocean leaves behind the heavier salt molecules.

Steps in the water cycle • EVAPOTRANSPIRATION • Water given off through leaves of

Steps in the water cycle • EVAPOTRANSPIRATION • Water given off through leaves of plants as water vapor (think of it like plants breathing)

Steps in the water cycle • CONDENSATION • Water changing form from gaseous state

Steps in the water cycle • CONDENSATION • Water changing form from gaseous state to liquid state • Water molecules lose energy, often as they cool, and are no longer able to stay as a gas.

Steps in the water cycle • PRECIPITATION • Water that falls to Earth as

Steps in the water cycle • PRECIPITATION • Water that falls to Earth as rain, snow, hail, or sleet • Most precipitation falls directly into the oceans. Dew Mist Fog Rain Hail Snow

Other minor steps Runoff • Water that flows over the ground surface rather than

Other minor steps Runoff • Water that flows over the ground surface rather than soaking into the ground Sub-surface flow Groundwater flow • Water that flows between the pores of rocks and soils in the ground • Water flowing between the pores of rocks and soils in the ground immediately near a stream, river, or spring

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