MEDIUM
8th CBSE
IMPORTANT
Earn 100

Petroleum occurs deep inside the earth floating over water. Which two properties of petroleum makes it possible to form a separate layer over water?

Important Questions on Coal and Petroleum

MEDIUM
8th CBSE
IMPORTANT
Science 8>Chapter 3 - Coal and Petroleum>Exercises>Q 4
How does planting of trees on large scale help in reducing the pollution caused due to the burning of fossil fuels? 
MEDIUM
8th CBSE
IMPORTANT
Science 8>Chapter 3 - Coal and Petroleum>Exercises>Puzzles and Quizez

Solve the crossword with the help of the clues given below. 

Question Image
ACROSS

1. A byproduct of petroleum not used as a fuel.

3. Organisation which promotes the conservation of petroleum.

6. An inexhaustible source of energy.

7. Petroleum by product used as auto fuel. 

DOWN 
1. Rainwater containing dissolved oxides of sulphur and nitrogen.

2. A gas obtained by heating coal and containing methane and hydrogen.

4. A product obtained from coal used in metallurgy.

5. A variety of coal.