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Natural Water Cycle

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on 24 December 2016

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Transcript of Natural Water Cycle

Natural Water Cycle

Have you been heard about Natural Water Cycle?

Today we will see together stages of Natural Water Cycle...
The natural sequence through which water passes into the atmosphere as water vapor, precipitates to earth in liquid or solid form, and ultimately returns to the atmosphere through evaporation.

1. Evaporation

Evaporation is the process of changing water from liquid to gas.

When the sun heats water in rivers, lakes or oceans, it provides enough energy to break the hydrogen bonds between water molecules. The individual molecules rise through the air into the atmosphere, in the form of water vapour or steam.
2. Condensation

Condensation is the process of changing water from gas to liquid.

As water vapour rises, it becomes cooler and changes back into tiny liquid water droplets. These merge together to form clouds.
3. Precipitation

Precipitation is when rain, snow, sleet or hail falls from the sky.

When so much water has condensed that the air cannot support its weight, water falls from the clouds back to Earth. Depending on the air temperature, water can take a liquid form (rain), or a solid form (snow, sleet or hail).

4. Infiltration
Infiltration occurs when water falls back to Earth, where some of it soaks into the ground. It is then collected underground in layers of rock, sand or gravel called aquifers – this water is known as groundwater.
5. Run-off

Run-off is when water does not soak into the ground, but flows across land instead. This water is called surface water, and collects in creeks which flow into larger rivers.
6. Transpiration

Transpiration when water evaprates from plants, mainly througho their leaves. This gets water vapour back into the air.

Thank you for your listening
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