5. is used as a fuel for enginevs and generators. 6. Petroleum is found locked in rocks deep below the Earth’s crust.
7. Natural gas is than air and mainly consists of .
8. is an alternative to petrol used to run vehicles.
9. is the chemical derived from petrol and natural gas.
10. Carbon dioxide emission is responsible for effect.
11. Principle is used to minimize the consumptions of non-biodegradable materials.
12. can lead to melting of the polar ice caps
II. Match the following:-
13. Natural gas a. Candles
14. Plastic b. Emission of carbon dioxide
15. Paraffin wax c. Non-biodegradable
16. Global warming d. Aviation fuel
17. Petrochemical e. CNG
III. State whether the following are true or false:-
18. Oxygen in air is an exhaustible natural resource.
19. Resources which are present in unlimited quantity in nature are
Called exhaustible natural resources.
20. Under high temperature and pressure, dead plants get slowly converted to coal.
21. CNG is less polluted fuel than petrol and diesel.
22. It is not important of conserve fossils fuels.
IV. Choose the correct -
23. Which of the following is not a natural resource?
a. Minerals b. Water c. Soil d. Plastic
24. Which of the following is pair of exhaustible natural resources?
a. Coal and soil b. Air and sunlight c. Water and petroleum d. Wildlife and minerals
25. Which of the following is not obtained from coal?
a. Coke b. Coal tar c. Coal gas d. CNG
26. Coal is formed from the remains of .
a. vegetation only b. animals only c. both vegetation and animals d. neither vegetation nor animals
27. Petroleum was formed from organisms:
a. Living on the land b. Living on the plants c. Living in the sea d. Living on the rocks.
V. Give one word for the following:
28. The process of the conversion of dead vegetation into coal.
29. It is also known as brown coal.
30. It is a mixture of hydrogen, methane and carbon dioxide.
31. Components obtained from refining of petroleum.
32. It is used as a solvent for dry cleaning.
33. It is used for surfacing of roads and in plants.