Question

Compare and contrast fossil fuels and the sun as direct sources of energy

Answer 1

Coal and petroleum are fossil fuels they are obtained from deep under Earth’s crust. They are directly available to human beings for use. Therefore fossil fuels are the direct source of energy. But these are limited in amount also they are non-renewable.
Solar energy is also a direct source of energy. But it is renewable source of energy. The Sun has been shining for several years and will continue billions of years more. Solar energy is available free of cost to all in unlimited amount.

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Answer 2

Comparison

# both are widely used source of energy.

# both are natural source of energy.

Contrast:

Fossil fuels

# it is a conventional source of energy.

# it is in a limited quantity.

# they can be used at anytime.

# it cause air pollution

# it need cost to buy

Sun

# it is non conventional source of energy.

# energy provided from sun is very large or unlimited.

# solar energy can be used only in daytime and on sunny day.

# it does not cause air pollution.

# it is free of cost