What if it Finishes...? - 1 Class 5 Worksheet EVS Chapter 12

Q1: Match the following

Ans:

Q2: MCQ

(i) Which of the following fuels gives least smoke? 
(a) Petrol
(b) Diesel
(c) CNG
(d) None of these
Ans: (c)
CNG is the fuel that makes the least smoke, which is good for the environment because it doesn't create a lot of pollution.

(ii) Which gas is used for cooking in homes? 
(a) CNG
(b) LPG
(c) Both (a) and (b)
(d) None of these
Ans: (b)
LPG, a type of gas, is what people use for cooking in their homes because it is safe and convenient.

(iii) To clean oil found deep down in the earth, it is sent to
(a) pumps
(b) refinery
(c) oil depot
(d) mills
Ans: (b)
When oil is found deep in the earth, it needs to be cleaned, and this process happens at a place called a refinery.

Q3: Fill in the blanks

(i) Adalaj step well is about _____ km away from Ahmedabad.
(ii) There were hardly any __________ on the highway.
(iii) Vehicles run on __________.
(iv) Vehicles  stopped  at  the __________ for fuel.
(v) On the posters at the petrol pump, it is written that __________ and __________ will not last forever.
(vi)  Petrol  is  formed  __________ but very slowly. 
(vii)  Petrol  is  found  deep  down under the __________.
(viii)  __________ is a smelly, thick, dark coloured liquid.
(ix) We get kerosene, diesel, petrol, engine oil, wax etc. from __________.  
(x)  Petroleum is cleaned and its products are separated in a __________.
Ans:
(i) 18
(ii) bicycles
(iii) fuel
(iv) petrol pump
(v) petrol, diesel
(vi) naturally
(vii) ground
(viii) Petroleum
(ix) petroleum
(x) refinery

Q4: True or False

(i) We should switch off the engine when we stop the car.

Ans: True. 
Switching off the engine when the car is stopped helps save fuel and reduces emissions.

(ii) Petrol and diesel are made by humans on machines.

Ans: False. 
Petrol and diesel are derived from crude oil, a natural resource. They are refined using machines, but they are not "made" by humans.

(iii) Electricity can be used to run vehicles.

Ans: True. 
Electric vehicles (EVs) run on electricity, which can be stored in batteries and used to power motors.

(iv) Crude oil is also used for making several other things like plastics and plants.

Ans: False. 
Crude oil is used to make products like plastics, synthetic fabrics, and other chemicals, but it is not used for making plants. The statement may be confusing the use of oil in manufacturing products with its role in biological processes.

(v) Vehicles that run on CNG give out a lot of smoke.

Ans: False. 
Vehicles running on Compressed Natural Gas (CNG) produce significantly less smoke and pollutants compared to those running on petrol or diesel.

Q5: Short Answer Type Questions

(i) Where is Adalaj's step well located?
Ans: Adalaj's step well is located in Ahmedabad.

(ii) Why was a child sitting in a rickshaw coughing badly?
Ans: Due to smoke coming from vehicles.

(iii) From where do we get petrol?
Ans: From petrol pump.
Petroleum is mainly found in the underground reservoirs where the ancient seas were located.

(iv) How is petrol pumped out?
Ans: Petroleum is pumped from the ground with the help of a machine

(v) What do women in the village use to make a fire to cook food?
Ans: Damp wood

(vi) Which states of India have oil fields?
Ans: The states having oil fields in India are Andhra Pradesh, Mizoram, Orissa, Tamil Nadu, Rajasthan, and Arunachal Pradesh.

(vii) Besides oil, what else is found deep inside the earth?
Ans: Besides oil, minerals like iron, copper, bauxite, gold, etc. deep are found inside the earth.

Q6: Long Answer Type Questions

(i) Why is CNG preferred as fuel to petrol and diesel?
Ans: Compressed natural gas is preferred as it is a very clean-burning fuel as in reality it is the cleanest of all fossil fuels. CNG usage is non-toxic to water levels also and does not contaminate the groundwater table.

(ii) Name the products obtained from petroleum.
Ans: Well-known petroleum products include:
Gasoline and Diesel fuel, Liquefied Petroleum Gas (LPG), Other fuels, such as fuel oil and Kerosene, Asphalt (a special form of concrete), Paraffin wax, Tar and Plastics.

(iii) What are the uses of petroleum?
Ans: The main uses of petroleum are as follows:
Transportation, Industrial power, Heating and lighting, Lubricants, Petrochemical industry,  Use of by-products.

(iv) How can we save petrol? (or) Suggest some ways to save petrol.
Ans: The following measures could be taken to save oil:

• In place of using personal vehicles, we should use public transport systems like buses, trains or metro trains, etc.
• We should prefer walking on foot or by bicycle.
• We should keep our vehicles switched off on red lights.
• We should utilize solar energy for different purposes.

(v) What kind of problems do we face if the number of vehicles keeps on increasing on the roads?
Ans: If the number of vehicles will keep on increasing then air pollution, water pollution, and sound pollution will increase.  The liberation of harmful gasses will ultimately increase.

(vi) What is a refinery?
Ans: Petroleum is a mixture of many substances such as gas, petrol, diesel, kerosene, lubricating oil, paraffin wax, etc. As these constituents serve different purposes, it is important to separate them, or in other words, refine the crude oil. This process of separation of various constituents of petroleum is called petroleum refining.