III. Fill in the gaps.

Water is shared by all living things but there is a limited _________of it. Where is it all being? Where is it all going?

All creatures including you __________ on water. None can survive without it. You are 2/3 of water and whenever you drink a glass of water you become a part of water cycle.

Water is the only __________ on the Earth that can naturally exist in all three basic forms: ice, __________ and water ________.

How did water first appear on the Earth? Some part of water came on our planet out from the space when massive quantities of oxygen and hydrogen combined to form space ice. An ___________ comet is made up of billion tons of ice. We and all other forms of life on the planet partly owe our existence to this extraterrestrial water.

The other source of water is from oxygen and hydrogen containing in the deep parts of the Earth.

Sea water was a perfect place for life to start with stable temperature, physical support and ready supply of nutrients. And evolution spread into the oceans. Strong currents powered by sun spread life across the globe. The life became richer and the animals became more__________.

Most rains start as ice. Summer storm clouds are mostly made up of super frozen water particles and when one of this collides and ice crystal floating in the cloud it grows into a ball of ice – hail storm. Gravity takes over and they fall down to Earth. But many hail storms can’t survive this trip they __________as they pass lower warmer air layer and then they transform into large drops of rain.

When conditions are right ice crystals are formed in the clouds. They grow until they are heavy enough to form__________.

Today about a tenth of our land is blanketed by ice and ice like liquid water is_________. It is strong enough to carve up a bed rock and yet it is so light that it floats in water.

But can we or should we control the water __________? Moving millions of tons of water the world has had an ____________effect. We’ve actually slowed down the Earth rotation. A day is now longer than it was a century ago. Many factors could affect water cycle over the next centuries or so but scientists predict the largest impact will come from the giant climate shift known as______________.

IV. Complete the crossword below.

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1. a very small amount of liquid with a round shape.

2. the amount of force that a gas or liquid produces in an area or container.

3. to be impossible to find.

4. to become larger than normal.

5. to keep something in a particular place.

6. a substance in food that plants, animals and people need to live and grow.

7. small balls of ice falling from the sky like rain.

8. a large amount of water that covers an area that was dry before.

9. to continue to exist, especially in a difficult or dangerous situations.

10. something that is extremely important because it has a major effect on the result of something.

11. to rest or to move slowly on the surface of a liquid and not sink.

12. movement in a circle around a fixed central point.

13. to crash into each other.

14. the central part of a planet.

15. extremely large.