What is it? We drink it, wash with it and swim in it. We cook  food with it, wash clothes in it and sail on it. We skate on it when it is frozen. It can heat things up and cool things down It can be hard as ice or scalding steam. It can be invisible............
It is water Pure water has no shape, colour or smell

All living things - people, animals, birds, fish, insects, plants and trees - need water for life

Water inside you
Did you know that you are mostly made up of water?
About two-thirds of your body is water. Water is in every part of you.
Water makes up a large part of what you eat and drink.
We can survive for weeks without food, but we would not live more than a few days without water.

Just think of the ways in which water helps us to survive

Sweat cools down our bodies. Tears clean and protect our eyes. Urine carries waste out of our bodies. We must replace all of the water we lose everyday Breathe on a mirror so that you can see the water in your breathe

• Liquid
• Solid
• Gas

Liquids flow and have no shape If you pour a liquid into a glass,  it takes on the shape of the glass

A solid has a shape If you remove an ice-cube from its container, it will hold its shape until it melts

When water is heated it reaches a point at which it cannot get any hotter. Then it turns into water vapour or steam. Steam is a gas

Do this after a heavy shower of rain on a mainly dry day You will need - a large puddle                     - chalk 1. Draw a line around the edge of the puddle with your chalk. 2. Write down the time.

Experiment 2
Find out why the water in some puddles evaporates faster than others.

You will need - water                       - marker (non water-soluble)                       - 2 identical plates or dishes                       - measuring jug 1. Fill each plate with the same amount of water. 2. Mark the water level on each plate with the marker 3. Leave one plate in a warm place (above a radiator)     and one in a cool place (in a cupboard). 4. Check each plate after two hours. What do you notice about the water? 5. Check each plate after two days. Which plate has the most water in it? 6. Why do you think this is so?

The Water Cycle
Most of the water on earth is salt water. It is found in the world's seas and oceans
The water in rivers, lakes, streams and ponds is fresh water.

The world's water is heated by the sun and drawn into the air. It falls back to earth as rain, hail, sleet or snow.
The water then flows back to the sea and is drawn up into the air again.
This is called the Water Cycle. It works like this.

1. When water is heated it changes into water vapour. The sun shines on seas, lakes and rivers.
    It shines on puddles and on wet laundry on the clothes line. When the sun warms the water, tiny droplets of water vapour rises into the air.
    This is called evaporation

2. High in the sky, the air is very cold. The cold air turns the water vapour into drops of water. These drops join together to make clouds.
    This is called condensation.

3. The clouds then get very heavy. When they do, the water drops fall to earth. They could fall as hail, rain, sleet or snow.
    This is called precipitation.

4. The water then flows along rivers and streams and then back into the seas and oceans.
    When the sun shines, it draws the vapour into the air.
    The water cycle begins again