Class-5 EVS, Chapter-12 What if it Finishes......?, Additional Exercises with Solutions /NCERT


Chapter-12
What if it Finishes…. ?

Fill in the blanks with suitable words:
1-  Vehicles which run on CNG give less smoke.
2-  Crude oil is smelly, thick, dark coloured liquid.
3-  We can save a lot of fuel, if we use public transport.
4-  Petrol and diesel will not last forever.
5-  Crude oil is formed naturally but slowly deep down the earth.

Match the column
A
B
LPG
are obtained from petroleum
CNG
Liquefied Petroleum Gas
Petrol, diesel, kerosene,  LPG, wax, coaltar
a place to clean and separate components of crude oil
Refinery
Compressed Natural Gas

A
B
LPG
Liquefied Petroleum Gas
CNG
Compressed Natural Gas
Petrol, diesel, kerosene,  LPG, wax, coaltar
are obtained from petroleum
Refinery
a place to clean and separate components of crude oil

State True or False:
1-  We should switch off the engine when we stop the car. True
2-  Petrol and diesel are made by humans on machines. False
3-  Electricity can be used to run vehicles.            True
4-  Crude oil is also used for making several other things like plastics and plants.                                             True
5-  Vehicles that run on CNG give out a lot of smoke.  True

The rates of petrol are different in each city. The rates of petrol and diesel in Delhi are given here. Look at the table and answer the questions.

Oil
Rate of one litre in 2002 (Oct)
Rate of one litre in 2007 (Oct)
Rate of one litre in 2014 (Oct)
Petrol
Rs 29.91
Rs 43.52
Rs 67.86
Diesel
Rs 18.91
Rs 30.48
Rs 58.97

1-  In 2014, as compared to 2007 the rate of petrol went up by ­24.34 rupees. The rate of diesel increased by_28.49  rupees.
2-  What was the difference in the rates of petrol and diesel from 2002 to 2007 and 2007 to 2014?

Ans- From 2002 to 2007
1-  Difference in rates of petrol is Rs. 15.61
2-  Difference in rates of diesel is Rs. 11.57
From 2007 to 2014
1-  Difference in rates of petrol is Rs. 24.34
2-  Difference in rates of diesel is Rs. 28.49

Click for Hindi (रिमझिम )-5 

Click here for English (Marigold)-5 

Kancha had seen a bar chart in a book. The chart shows the number of houses out of 100 that use each type of fuel. It also shows the use of which fuel has increased and which fuel has decreased over the past twenty years.



                
·       In year 1976, out of 100 how many houses used uple and wood?
Ans- 84 houses

·       Which was the fuel used the least in 1976?
Ans- Electricity

·       In 1976, LPG and kerosene were used in__10__houses and in 1996 this increased to_18__. This means that in twenty years their use increased by_80____%.

·       Out of 100, how many houses were using electricity in 1996?
Ans- 5

·       Which fuel was used the least in 1996? What percentage of houses used it in the year 1976?
Ans- Coal was used the least in 1996
            In the year 1976, only 5 % houses used it.

Make a poster with a message on saving fuel. Write a slogan too.
  
               Slogan : Save Fuel for Future

Answer the following questions:

Q. Which states of India have oil fields?
Ans- Following states of India have oil fields:
1-  Eastern Assam
2-  Arunachal Pradesh
3-  Nagaland
4-  Southern West Bengal
5-  Himachal Pradesh
6-  Punjab
7-  Uttar Pradesh
8-  Bihar
9-  Gujrat
10-              Bombay High (Maharashtra)
11-              Goa and Kerala

Q. Besides oil what else is found deep inside the earth?
Ans- Besides oil, minerals like copper, bauxite and precious gems like diamond, ruby are found deep inside the earth.

Q. We should use petrol and diesel judiciously. Think why?
Ans- We should use petrol and diesel judiciously because in nature, they do not get made as fast as we take them out.

Q. Where all is oil used?
Ans- Uses of oil are as follows:
1-  For dry cleaning
2-  For lighting of lamps
3-  As petrol, diesel or aeroplane fuel
4-  As kerosene and LPG for cooking
5-  To run machines
6-  For making plastic and paints
7-  For making products like wax, camphor etc.

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