UNIT 4 CLIMATEPart I

The hydrologic cycle

The Hydrologic cycle

This is also called the water cycle It is the recycling of the water between

the oceans, land and atmosphere

There are 6 main parts to the water or hydrologic cycle.

Part of the Hydrologic cycle

Solar Radiation- the sun, the source of energy need for the water cycle

Condensation –is the process by which water transitions from a gas (or vapor) phase into a liquid phase ( cloud)

Precipitation- returns water to the Earth in the form of snow, rain, sleet, hail

Evaporation- returns water to the atmosphere in the form a gas

Transpiration- is the evaporation of water from vegetation Water storage- place on the earth that water is stored

until it is re-evaporated into the atmosphere (lakes, oceans, ice caps)

Infiltration- is water soaking into the ground Runoff- water flowing along the surface of the earth

The Water cycle

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More hydrologic cycle

The Earth has a LIMITED supply of water Once we harm the water bad enough

we are not able to use it. Approximately 70-75% of the Earth is covered

with water ( salt). The amount of water that seeps into the ground

or runs-along the surface is influenced by:• Climate• Slope• Soil type• Rock type• Vegetation• Land use and degree of saturation

Why does run-off occur?

Run- off occurs when:• The ground is

saturated• The slope is too

great• It is to cold , the

ground if frozen• When there has

been a lot of rain

Ground water

Ground water is water that is found below the ground

Ground water is filtered as it moved through the rock and soil.

Groundwater Zones

Zone of Aeration -upper soil layers that hold both air and water..

Zone of saturation- layer of soil below the water table where the ground is saturated with water

Water table- The level below which the ground is saturated with water.

Impermeable layer- a layer of solid material, such as rock or clay, which does not allow water to pass through..-

Water cycle project

Choose either the picture of the water cycle or the groundwater zone

On pasteboard draw a picture of what you have chosen.

Label and define each of the important parts