THE WATER CYCLE |
Sunshine |
The
sun shines on water in rivers, lakes, streams, wetlands
and oceans and makes the water warmer. This turns the
water into vapor or steam. The water vapor leaves the
lake or ocean or river and goes into the air, where it becomes
a cloud. |
Evaporation |
Evaporation
is when the sun heats up water in rivers or lakes or the ocean
and turns it into vapor or steam. The water vapor or
steam leaves the river or lake or ocean and goes into the
air, where it becomes a cloud. |
Rain |
When
the temperature is warm, like during the spring or
summer, clouds get so full of water that rain starts to
fall. The rain falls onto the land and runs into streams
and rivers. The water in the streams and rivers runs into
lakes and finally into the ocean. Some of the rain that falls
soaks into the ground and stays there until plants drink
it or until it goes deep enough into the ground that it
is called "groundwater" and goes to people's
wells. |
Snow |
Snow
is just like rain except it falls when the air is cold,
like during late fall and winter. Snow usually stays on
top of the ground until it melts, then it turns into
water and runs into streams and rivers. Some of the water
from melted snow also goes into the ground for plants and people to
drink. |
| Mountains and Ice |
Some
of the snow that falls onto mountains stays there a long
time because it is so cold most of the time at the top of
mountains. This snow turns into ice and sometimes becomes
glaciers. Snow and ice on the top of mountains can stay
there sometimes for hundreds of years before it finally melts
and runs into the streams and rivers. |
| Rivers and Streams
|
Rivers
and streams carry the water that comes from rain and
melted snow into the ocean. They sometimes can carry this
water a long way. The Mississippi River in the middle of
the United States carries rain and melted snow from Minnesota
and Canada all the way to the Gulf of Mexico. When the weather
is warm, sometimes the sun makes the rivers and streams warm,
some of the water turns into steam or vapor, and it
leaves the river and goes into the air where it becomes a
cloud. |
| Oceans
|
Oceans are like really big lakes. Rivers and streams carry all of the water that comes from rain and melted snow into the oceans. When water gets into the oceans, it mixes and becomes salty. When the sun shines on the oceans, the water gets warmer and becomes vapor, which goes into the air and becomes a cloud. Most of the water on the earth is in the oceans. |
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