E. A. Abdalina, R. J. Hoshimova

in spite of— shumgaqaramasdan

in all these aspects — har taraflama

for these reasons — shu sabablarga ko’ra



IX. Answer the following questions after reading the text given below

1. 
   How much water is there in the human body?
   
2. 
   What are the three states of water?
   
3. 
   What causes the saltness of water?
   

WATER

Water is one of the commonest of all substances, and without it life would be impossible. The seas and oceans cover a vast expance of the Earth's surface but water is also contained in the soil, in the atmosphere and in all living things. More than half of the human body consists of water, which also forms a large part of the food we eat, especially vegetables and fruit. Man can live as long as ninety days or more without food, but we cannot live long without water.

Water exists as a substance in three states: ice, which melts at O degrees Centigrade; liquid water and steam, the latter is formed when water boils at 100 Centigrade.
Water differs from other liquids. It expands when cooled from 0° Centigrade, contracts when heated from 0" to 4° Centigrade, and reaches its maximum density at 4° Centigrade. No other liquid possesses this property.
Pure water is rarely found in nature. This is because water is able to dissolve so many substances from the air, the soil and the rocks. The salt ness of sea water is caused by the mineral substances which are dissolved from the Earth's surface by rivers and carried down to the sea. The Sun's heat causes the surface sea water to evaporate, or change into vapour, leaving behind the salt and other minerals. This explains why the seas are so much more salty than rivers flowing into them.


No te

Man can live as long as ninety days or more-without food — Odam to’qson yoki undan ko’proq kun ovqatsiz yashashi mumkin.