Answer the following questions.
(a) What is meant by ‘fuel’?
(b) Name the different types of fossil fuels.
(c) Which are the renewable sources of energy?
(d) Which element is used for the production of atomic power?
(a) Fuel is a substance that produces energy on burning. For example, coal, petroleum etc.
(b) Different types of fossil fuels are coal, mineral oil and natural gas.
(c) Renewable sources of energy are those that are replenished at a rate faster than that at which they are consumed. For example, solar energy, wind energy etc.
(d) Uranium is used for the production of atomic power.