Question

0.1. Fill in the blanks:
(1) Out of the total water available on the earth, fresh water forms
(2) Factors which support life on earth are
(3) The uppermost layer of land is called
and
constituent
(5) We get useful substances like salt, iodine from
is celebrated worldwide as 'Ozone Protection Da
rays comin
is the earth's protective layer.
*15) The ozone layer absorbs the harmful
(9) Burning of fossil fuels causes
0.2. State whether the following statements are True or False:
) Land and soil are the same thing
(2) Soil, land and air are important natural resources,
(3) The water in a lake is called ground water.
(4) The outermost layer of the earth is made up of soil and rocks.
(5) It takes around 1000 years for a 25 cm thick layer of soil to be formed.
(6) Xenon is used in flash photography.
*(7) Radon is used in decorative lights.
(5) It is necessary to use natural resources thriftily.
Helium is used for generating lift in airships.
(1) Stoned water does not become stale at once.
0.3. Find the odd man out:
11) Micro-organisms, fungus, insects, soil particles.
2) Salt air, iodine, pearls.
3) Helium, oxygen, neon, argon​

Answer 1

Answer:

Explanation:

1) 23%

2) water and oxygen

3)crust, humus

4)sea water

5)16 sept

6)ultra-violet rays