Question 2:
Give the names of two energy sources that you would consider to be exhaustible.
Give reasons for your choices.
Answer:
Two exhaustible energy sources are as follows:
(a) Coal: It is produced from dead remains of plants and animals that remain
buried under the earth’s crust for millions of years. It takes millions of years
to produce coal.
Industrialization has increased the demand of coal. However, coal cannot
replenish within a short period of time. Hence, it is a non-renewable or
exhaustible source of energy.
(b) Wood: It is obtained from forests. Deforestation at a faster rate has caused
a reduction in the number of forests on the Earth. It takes hundreds of years to
grow a forest. If deforestation is continued at this rate, then there would be no
wood left on the Earth. Hence, wood is an exhaustible source of energy.
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