Sunday, February 10, 2013
Friday, February 8, 2013
THE WATER CYCLE: FROM THE LAND TO THE SEA
When rain falls on the land, it forms streams.
Streams flow into rivers.
Rivers flow into seas and oceans.
When snow melts, it flows into the streams and rivers and finally reaches the sea.
Sometimes, rainwater and melted snow sink deep into the ground to form aquifers.
Water from wells and springs comes from aquifers.
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| Photo from: "Banco de recursos del ITE" |
THE WATER CYCLE: FROM THE CLOUDS TO THE LAND
As clouds move across the sky, the tiny water droplets in the clouds join together to form larger drops.
These large drops of water fall to the land as rain.
When rain freezes, it falls to the land as snow or hail.
THE WATER CYCLE: FROM THE OCEANS TO THE CLOUDS
Water is continually moving around the Earth.
This causes the water cycle.
The water cycle begins when water from the oceans, lakes and rivers heats up and evaporates to form water vapour.
Water vapour passes into the cold atmosphere.
The cold temperature makes the water vapour cool down and condense.
Condensed water in the atmosphere turns into tiny water droplets and forms clouds.
Clouds move across the sky with the wind.
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| Photo from: "Banco de recursos del ITE" |
Wednesday, February 6, 2013
SNOW AND ICE
In winter water freezes
and becomes ice and snow in cold weather.
In spring and
summer ice and snow melt and turn into liquid water again.
The coldest
areas on Earth are the North Pole and the South Pole.
These areas are covered
with giant blocks of ice.
Sometimes, large pieces of ice break off and float in
the ocean.
These are called icebergs.
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| Iceberg. By Rghrous |
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| Photo from Literativa |
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