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6a A source of life

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1 Read  A . R e a d a n d m a t c h t h e q u e s t i o n s w i t h t h e a n s w e r s .
A. Read and match the questions with the answers.
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Then listen and check your answers. .
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1 I read somewhere that the human body is
75% water. Is that true?
& 2 Is it true that the Earth and Mars are the
Mike, Dorchester
only planets in our solar system with
water?
© MM Publications
Bob, Leeds
Angie, St Ives
This month find out 3 Where’s the deepest point in the sea?
A boy at school said that he could survive
about WATER 4 without water for more than a month. Is
this possible?
a It’s in the Pacific Ocean, which is the largest Mary, Plymouth
ocean, containing 30% of all the water on the B. Read again and write T for True or F for False.
Earth. The deepest point is called the Marianas
Trench and it’s 10,918 m deep. By comparison, 1. A person who weighs 40 kg contains
Mt Everest is 8,848 m high. You would need to 70 litres of water.
put twenty-nine Empire State Buildings one on 2. Mars is also called the Red Planet.
top of the other to get from the bottom of the 3. Mt Everest is as high as twenty-nine Empire
Marianas Trench to the surface!
State Buildings one on top of the other.
b Well, there’s no water on the surface of 4. The Marianas Trench is in the Pacific Ocean.
the Red Planet at the moment, but scientists 5. If you lose between 6-10% of the water
examining Mars have found ice under the north in your body, you can get dizzy or have
and south poles. So, the Earth is the only planet blurred vision.
in our solar system with water on the surface.
Actually, 72% of its surface is covered by water. C. Read the text again. Find words and match
them with the meanings below.
c Well, it’s not quite that much. The human 1. the sun and all the planets that move around it
body is 50-65% water. This means that (question 2):
someone weighing 70 kg contains around
40 litres of water. 2. the top part of an area of sea or land
(answer b):
d Well, a person can survive without food
for more than a month but you can only live 3. looking at something or someone very carefully
without water for approximately one week. (answer b):
To stay healthy you should drink eight glasses
of water a day or even more if you live in a 4. almost, about (answer d):
hot country or do lots of exercise. Remember
that when your mouth feels dry, it means that 5. the opposite of wet (answer d):
you’ve lost between 6-10% of the water in your
body. That’s enough to make you dizzy or give 6. the ability to see (answer d):
you blurred vision.

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