Each one is so small that you can't see it even with the most powerful microscope. Pure water has no colour, no taste and doesn't smell of anything. Water can change from one form to another with a change in temperature. Most of the water found on the Earth's surface is in liquid form. The blue ocean colour you see is due to reflections from the sky.
Water is a scarce and precious resource.
Around 70 per cent of the Earth's surface is covered by water, in oceans, seas, lakes, rivers and swamps. An interesting property of ice is that it freezes from the top down. Have you or someone in your family ever left a bottle in the freezer. Unfortunately for us, most of the water on Earth is salty or frozen. Only a very small amount is suitable for us to use in our day to day lives.