What if it Finishes...? - 2 Class 5 Worksheet EVS Chapter 12

Q1: Fill in the Blanks

(i) We get L.P.G., wax, kerosene, petrol, coal tar and fuel for aircrafts from________.
(ii) Sound of the loud horns causes _______ pollution.
(iii) The smoke of the vehicles can cause _____.
(iv) To clean petroleum, it is sent to _______.
(v) The poor villagers of our country still use _____ and ______ as fuel to cook food.
(vi) ______ is a smelly, thick, dark coloured liquid.
(vii) Adalaj step well is about ____ km. from Ahmedabad.
Ans:
(i) petroleum
(ii) noise
(iii) cough or breathing problem
(iv) refinery
(v) wood, uple or cow dung and dry twig
(vi) Petroleum
(vii) 18

Q2: True and False

(i) We should use CNG over petrol.
(ii) We should not pool car while going to some same place to save fuel.
(iii) Bus is more fuel efficient than car.
(iv) The maximum use of cars, scooters etc. cause pollution.
(v) Petroleum should be used carefully to save fuel as well as environment.
Ans:
(i) True
(ii) False
(iii) True
(iv) True
(v) True

Q3: Short Answer Type Questions

(i) From where do we get petroleum?
Ans: We get petroleum from deep down under the ground.

(ii) How bus is more fuel efficient than car?
Ans: A bus can carry 40 to 50 passengers at a time where as car carries only.

(iii) Write full form of LPG and CNG.
Ans: Full form of

• LPG is liquid petroleum gas.
• CNG is compressed petroleum gas.

(iv) How is petroleum formed?
Ans: It is formed naturally but very slowly. It takes thousands years to form.

(v) How do we clean the raw petroleum?
Ans: To clean raw petroleum it is sent to refinery.

(vi) What is refinery?
Ans: Refinery is a place where crude oil (petroleum) is cleaned and diesel petrol grease, wax etc. are separated.

Q4: Long Answer Type Questions

(i) How can we save petrol?
Ans: We can save petrol by following ways:-

• We should go to nearby areas on foot.
• We should pool our car if we are going to some same place.
• We should go by bus from one place to another.
• We should switch off the engine of our vehicle at red light.
• We should use CNG in our cars instead of petrol or diesel.

(ii) How do we pump out petroleum from the deep?
Ans: We can pump out petroleum like we pump out water by using bore well. We need big machines and pipes to pump it out and clean it.

(iii) How many villagers in India use dry twig, wood and cow dung? And why?
Ans: Nearly 2/3 people in our country use these things. They use these things for cooking food, keeping warm, heating water and for lightening.

(iv) Write some uses of petroleum?
Ans: It is used to run vehicles.

• It is used to generate (make) electricity.
• It is used to cook food.
• It is used to run machines.
• It is used to run aircrafts and ships.
• It is used to make paints.

(v) How carpooling is a wise way to save petrol?
Ans: If 5 people are going to the same place by pooling car they will be using less fuel. Whereas individually they are using 5 times more fuel.

(vi) Why is there need to clean petroleum?
Ans: This oil is smelly, thick and dark coloured liquid. It has kerosene oil, wax, diesel, engine oil, grease and coal tar and petrol. That is why petroleum needs to be cleaned and all the things are to be separated.  

(vii) Why should we use LPG in kitchen and CNG in vehicles?
Ans: Both LPG and CNG are smoke free gas. They do not spread pollution. So we should use these gases in our kitchen and vehicles respectively.

(viii) What kind of problems do we face because of the increasing number of vehicles on the roads?
Ans: The increasing number of vehicles causes traffic jam.

• It also causes noise and air pollution.
• It also causes breathing problem.
• It causes cough.
• It also results in global warming.