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[in Spanish]

KidZone Science
The Water Cycle

Contributed by Leanne Guenther

Run and get a glass of water and put it on the table next to you.  Take a good long look at the water.  Now -- can you guess how old it is?

water cycle knight

water cycle dinosaurThe water in your glass may have fallen from the sky as rain just last week, but the water itself has been around pretty much as long as the earth has!

When the first fish crawled out of the ocean onto the land, your glass of water was part of that ocean.  When the Brontosaurus walked through lakes feeding on  plants, your glass of water was part of those lakes.  When kings and princesses, knights and squires took a drink from their wells, your glass of water was part of those wells.

And you thought your parents were OLD

 


water cycle

The earth has a limited amount of water.  That water keeps going around and around and around and around and (well, you get the idea) in what we call the "Water Cycle".

This cycle is made up of a few main parts:


water cycle evaporationEvaporation:  

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, lake or ocean and goes into the air.

 

water cycle sweat

Do plants sweat?

Well, sort of....  People perspire (sweat) and plants transpire.  Transpiration is the process by which plants lose water out of their leaves.  Transpiration gives evaporation a bit of a hand in getting the water vapor back up into the air.


water cycle condensationCondensation:

Water vapor in the air gets cold and changes back into liquid, forming clouds. This is called condensation.

You can see the same sort of thing at home...  Pour a glass of cold water on a hot day and watch what happens.  Water forms on the outside of the glass.  That water didn't somehow leak through the glass!  It actually came from the air.  Water vapor in the warm air, turns back into liquid when it touches the cold glass.

 


water cyclePrecipitation:

water cyclePrecipitation occurs when so much water has condensed that the air cannot hold it anymore.  The clouds get heavy and water falls back to the earth in the form of rain, hail, sleet or snow.

 

 


water cycle collectionCollection:

When water falls back to earth as precipitation, it may fall back in the oceans, lakes or rivers or it may end up on land.  When it ends up on land, it will either soak into the earth and become part of the “ground water” that plants and animals use to drink or it may run over the soil and collect in the oceans, lakes or rivers where the cycle starts

all over again.

 


Water Cycle Activity Pages.

Print these out and use them as posters or coloring pages.  Sheets 2 thru 4 have some suggested activities you can do at home to demonstrate the Water Cycle.

Sheet 1  -  (color)   or   (B&W)

Sheet 2  -  (color)   or   (B&W)

Sheet 3  -  (color)   or   (B&W)

Sheet 4  -  (color)   or   (B&W)

Sheet 5  -  (color)   or   (B&W)

 

Check out the Spanish version of the Water Cycle >

 


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