WATERWATERTHE STORY OF A DROPTHE STORY OF A DROP

HOW IMPORTANT IS WATER?HOW IMPORTANT IS WATER?

Water is essential for life, and it is Water is essential for life, and it is present everywhere:present everywhere:

- Water covers 70% of our planetWater covers 70% of our planet

- 60%/70% of our body is water60%/70% of our body is water

WHERE IS WATER?WHERE IS WATER?

Think for a minute where you can find Think for a minute where you can find water. It isn’t too difficult. water. It isn’t too difficult.

Here are some ideas:Here are some ideas:

• When you have a showerWhen you have a shower• When you go to the toiletWhen you go to the toilet• When you wash the dishesWhen you wash the dishes• When you are thirstyWhen you are thirsty

• When it rainsWhen it rains

• In rivers and oceansIn rivers and oceans

• In theme parksIn theme parks

• Our plants and animals need Our plants and animals need water toowater too

Water is so important that life Water is so important that life can’t exist without itcan’t exist without it

Where does water come from?Where does water come from?

• In this unit you are going to learn:In this unit you are going to learn:- How rivers are formedHow rivers are formed - How we get rainHow we get rain

- How we get water from rivers to take it How we get water from rivers to take it to our housesto our houses

- How we store and manipulate waterHow we store and manipulate water

- How we use water How we use water

- How we can save waterHow we can save water

SOME QUESTIONS ABOUT SOME QUESTIONS ABOUT WATERWATER

• Is the amount of water Is the amount of water we can use limited?we can use limited?

Yes, it is. Yes, it is. Only Only one one percent is drinkablepercent is drinkable, , and half of this drinkable and half of this drinkable water is found below the water is found below the earth's surface earth's surface

ConsequenceConsequence: : we must save we must save water water

• All the water we have on earth is all the water we will All the water we have on earth is all the water we will ever have—we cannot make more. That means it is a ever have—we cannot make more. That means it is a non-renewable resourcenon-renewable resource..How is that possible?How is that possible?

the water cyclethe water cycle has recycled the water supply for billions of years. We has recycled the water supply for billions of years. We use the same water that the dinosaurs useduse the same water that the dinosaurs used

But, if we are not careful with water, some day we might run out of clean, fresh water. But, if we are not careful with water, some day we might run out of clean, fresh water.

• It is important to save It is important to save water, but it is also water, but it is also important to keep water important to keep water clean. clean.

• How does water get dirty?How does water get dirty? Some ideas:Some ideas:

- Pet waste contains harmful Pet waste contains harmful bacteria that can wash into bacteria that can wash into rivers, streams and lakes. rivers, streams and lakes.

- Using pesticides or Using pesticides or fertilizers in agriculturefertilizers in agriculture

- Factories and refineries Factories and refineries emit polluting fluids that emit polluting fluids that wash into rivers and lakeswash into rivers and lakes

• To clean water, we have sewage treatment To clean water, we have sewage treatment plantsplants

• When it is clean, it can be used again at When it is clean, it can be used again at home, in agriculture, in industry, etc. so the home, in agriculture, in industry, etc. so the process starts again.process starts again.

Uf! It’s not easy being a drop of water. I travel a Uf! It’s not easy being a drop of water. I travel a long way to get to you, in rain waterlong way to get to you, in rain water

through rivers and pipesthrough rivers and pipes

under bridges or in bottles.under bridges or in bottles.

Sometimes I take a rest in dams and oceans.Sometimes I take a rest in dams and oceans.

Sometimes I get frozen, sometimes I become Sometimes I get frozen, sometimes I become vapor, but it’s always fascinating. Come with me vapor, but it’s always fascinating. Come with me and find out moreand find out more