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 answer:-
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.
Answers
Answer:
5) Diesel
6) Oceans
7) less, hydrocarbons(methane) CH4
8) Electricity
9) petrochemicals
10) Green house
11) 4R (Reduce,Reuse,Recycle,Recovery)
12) Global warming
13) Can't understand
14) Can't understand
15) Can't understand
16) Can't understand
17) Can't understand
18) True
19) False
20) True
22) Can't understand
23) (d) Plastic
24) It can be d) or c) more chances to c) Water and petroleum
25) d) CNG
26) a) vegetation only
27) c) Living in the sea
28) carbonization
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29) lignite
30) Coal gas
31) gasoline,diesel,wax,kerosene,petroleum gas,jet fuels, petrol
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33) Bitumen
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