Wednesday, 16 June 2021

CBSE Class 8 Science - Chapter: Coal and Petroleum (Worksheet)(#class8Science)(#eduvictors)

CBSE Class 8 Science - Chapter: Coal and Petroleum (Worksheet)

CBSE Class 8 Science - Chapter: Coal and Petroleum (Worksheet)(#class8Science)(#eduvictors)



Fill in the blanks with suitable words.


1. _________ are the substances obtained from petroleum and natural gas.


2. Petroleum is obtained from dead remains of living organisms, that is why it is called a ________ fuel.


3. Kerosene is used in ______ aircrafts.


4. In India, ________ gas has been found in Tripura, Rajasthan, Maharashtra and in the Krishna Godavari delta.


5. The processing of coal to get coke also yields ________ gas.


6. The resources which are available in large quantities in nature and will not be depleted even after continuous usage are known as _________ natural resources.


7. The resources which are available in limited quantities in nature and will get depleted after continuous usage, are known as ________ natural resources.


8. The process of conversion of dead plants or vegetation into coal is known as ________.


9. ___________ is a mixture of about 200 substances. It is a black thick liquid with an unpleasant smell.


10. _________ (a petroleum product) has almost replaced coal tar for metalling the roads.


11. Due to its great commercial importance, petroleum is also called ‘_______ gold’.


12. The process of separating the various constituents/fractions of petroleum is known as __________.


13. _______, a constituent of petroleum, is commonly used as fuel for heavy motor vehicles, electric generators.


14. Least polluting fuel commonly used for vehicles is ________.


15. Ointments, candles and vaseline are __________.



Answers:

1. Petrochemicals

2. fossil

3. jet

4. natural

5. coal

6. Inexhaustible

7. Exhaustible

8. carbonisation

9. Coal tar

10. Bitumen

11. black

12. refining

13. Diesel

14. CNG

15. Paraffin wax


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