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Chapter 27 - Man and his Environment - 6
1.
All the resources necessary for life are part of natural cycles
a) False
b) True
2.
About 79 % of the total water of planet earth is in ocean.
a) False
b) True
3.
Polluted air contains certain gases like carbon monoxide, Hydrocarbons and oxides of nitrogen and sulphur.
a) True
b) False
4.
4 % of the total area of the world is under cultivation.
a) False
b) True
5.
95 % of our daily energy requirements are met from fossil fuels.
a) True
b) False
6.
Rain is a renewable energy source, which gets its energy directly from sun.
a) False
b) True
7.
The natural heat energy trapped under ground is called nuclear energy.
a) True
b) False
8.
In ocean, especially in tropical regions, temperature of surface water is about 5
o
C.
a) True
b) False
9.
About 20 years ago the human population was increasing at the rate of 0.5 % a year.
a) True
b) False
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