Page 106 - EVS Class 05

Renewable and Non-Renewable Sources of Energy

We know that fossil fuels are non-renewable sources of energy. These cannot

be regenerated in a short time. The rate at which they are being used, soon
a time will come when we will face a shortage of these fuels. Our future

generations will not be able to see them.

There is an urgent need for us to depend on renewable sources of energy,
like the wind, sun, flowing water, etc. Wind energy from windmills is used to
generate electricity. Solar energy is used to run solar cookers and solar

calculators. These forms of energy are always available and are non-

polluting.

* Any material that is burnt to obtain energy is called a fuel.
* The two kinds of fuels are fossil fuels and alternate fuels.

* Coal is a fossil fuel. Petroleum is also known as black gold.

* Kerosene is used as a domestic fuel in stoves to cook food.
* Liquefied hydrogen is used as fuel in spacecrafts.

* Trains, metro rail, trams and cable cars run on electricity.

* The price of petrol, diesel, kerosene and LPG are revised several times.

A. Answer the following questions.

1. What are fossil fuels? Name them.
2. How is coal produced in nature?

3. What are the products obtained after refining crude oil?

4. What is natural gas?

5. What are the alternative sources of energy? Give three examples.
6. Distinguish between renewable and non-renewable sources of energy.

B. Fill in the blanks.

1. __________________ is used as a fuel for cooking and heating.

2. Petroleum is also known as __________________ .

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