Water Cycle Vocabulary

The Water Cycle
The change and movement of the Earth’s water from liquid to vaporto solid. The water cycle is solar powered.
Oceans
store most of the Earth’s water. Over 70% of the Earth’s surface is ocean; itcontains 96.

5% of the world’s water supply.

Evaporation
occurs when the sun heats water up and it becomes vapor in the air
Condensation
is the opposite of evaporation; it occurs when air cools and the vaporcollects into liquid form.
Precipitation
is condensation falling onto land in the form of rain, sleet, hail, snow, andmist. Only 10% of water evaporated falls as precipitation.
Sublimation
occurs when snow or ice (considered the solid form of water) changesdirectly into vapor (dry ice).
Desublimation
is the opposite of sublimation; it occurs when the vapor turns directlyinto solid ice or snow.
Evapotranspiration
occurs when water is discharged as vapor into the atmosphere as aresult of evaporation from the soil and transpiration by plants.

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Transpiration is howwater is carried through the plants from the roots. The stomata on the underside of leavesallows water to escape into the air. Factors that affect transpiration include temperature,humidity, wind, soil moisture, and type of plant.

Plant Uptake
is how much water the plant absorbs and uses.
Surface Runoff
is when precipitation travels over the soil surface to the nearest streamchannel. When rain hits saturated or impervious ground, it will flow downhill. It isaffected by topographic, geographic, and geologic factors.

Snowmelt runoff to streams
is when snow and ice melt into surface water and moveacross the soil surface into streams.
Stream flow
is the movement of water in a natural channel such as a river. The amountof water flowing in the stream is affected by the watershed’s surface runoff, springs, andgroundwater discharge.
Infiltration
is the downward movement of water from the land surface into the soil orporous rock.

Ground water begins as precipitation. Once water infiltrates the soil it canmove vertically and horizontally through the soil.

Groundwater Storage
is the water that exists for long periods below the Earth’ssurface.
Groundwater Discharge
is the movement of water out of the ground
Spring
is an example of a groundwater discharge.

It is usually formed when the side ofa hill, a valley bottom, or other excavation intersects at or below the local water table,below which the substrate is saturated. It is most prevalent in limestone and dolomite,which fracture easily and can be dissolved by rainfall.

Freshwater Storage
includes wetlands, lakes, ponds, and large rivers that holdfreshwater.
Water Storage in the Atmosphere
Water is stored as vapor such as clouds andhumidity. The atmosphere is full of water. It is the superhighway used to move wateraround the globe. However, it is a poor storage area holding only .001% of the Earth’swater.

An evaporated water molecule spends an average of 10 days in the atmosphere