Water: liquid, solid and gas

Water is a liquid.
When it freezes it is ice.
Ice is solid water.
When water gets hot it turns into vapour.
We call it steam, and it is a gas.

We can see water in three different ways: liquid, solid, gas.

Water as a liquid comes pouring out of our taps.
We use it for washing.
We paddle, play and swim in it and float boats on it.
We use its power.
Water in its liquid form makes streams, creeks and rivers.
Rain is liquid.


Water becomes solid when it freezes. We call it ice.

We can make ice by putting water into the freezer, but ice can be made by nature when the weather is cold enough.

Frozen rain is called hail or snow. We use ice and snow for sport and play.
Frozen rivers are called glaciers.
Pieces of glaciers that break off into the sea are icebergs.
When ice floats, most of it is under the surface and only part of it is seen above.


When a kettle boils, you see steam coming from the spout. That steam is water in its gas state.
If the steam touches a wall for example, it turns back into liquid drops of water.

If you look at a puddle on the ground when the sun shines on it, you will see steam rising. After a while the puddle disappears. The water has evaporated, or turned into gas and gone into the air to join the clouds in the sky.

When the clouds get big and heavy, the water turns into liquid again and drops of water fall to the earth.
We call that rain!

This continual movement of water is called the water cycle:

Heat from the sun soaks up water from streams, rivers, lakes, oceans, and even plants.
This is evaporation.
(say ee-vap-uh-ray-shun)

As the water mixes with the air it becomes vapour, or a gas. It cools and forms clouds.
This is condensation.
(say con-den-say-shun)

The clouds get heavy. When they can hold no more water, it falls back to earth as rain, hail or snow.
This is precipitation.
(say press-ip- it-ay-shun)

The rain falls into oceans and on land in lakes and dams. Water soaks underground. Rivers and streams take water into the oceans and lakes. 
This is collection.
(say coll-ec-shun)


Go here to see how the water cycle works:

http://www.epa.gov/safewater/kids/flash/flash_watercycle.html


If you use any part of this in your own work, acknowledge this source in your bibliography like this:
Sydenham, S. & Thomas, R. Water: Liquid, Solid, Gas [Online] www.kidcyber.com.au (2010)

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