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5. What is the main principle behind the refining the petroleum? 1

Concept – Natural gas

1. What is natural gas? 1

2. Where can natural gas are found? 1

3. Why natural gas is also known as a clean fuel? 1

4. Write two uses of natural gas. 1

5. Write two advantages of natural gas. 1

Concept – Petrochemical

1. What do you mean by petrochemical? 1

2. Give two examples of petrochemical. 1

3. How are petrochemicals important to us? 1

4. Why petroleum is known as black gold? 1

Concept – Fossil fuels are limited

1. Why we should be careful while using fossil fuels? 1

2. What is PCRA? 1
3. Give two suggestions how we can save fuel. 1
4. Why we should minimize the use of fossil fuels? (2points) 1

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