About 70% of the Earth's surface is covered in water, and almost all of that water has been around since the Earth formed billions and billions of years ago. That means a glass of water you drink today could be water that a dinosaur once sipped.

        Water is constantly recycled on Earth as rain, snow,  oceans, lakes, streams, hail, and glaciers. Scientists call the recycling of water the water cycle (pretty clever, huh?).
 

1). Evaporation happens when lakes, oceans, rivers, and streams are heated by the sun. The liquid water evaporates into a gas called water vapour.

 

2). Condensation is when the water vapour comes together to make clouds.

 

3).  Precipitation is when water from the clouds falls to Earth as rain, sleet, hail, or snow.
 

 

 
 4).  And collection happens when the rain, hail, snow, or sleet  gather back into oceans, lakes, rivers, streams, and glaciers.
 

    The water cycle goes around and around, all the time, all over the world.