CBSE Class 5 EVS: What If It Finishes? NCERT Solutions

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NCERT Solutions PDF Class 5 PDF

This chapter, 'What If It Finishes?', for CBSE Class 5 Environmental Studies, delves into the crucial topic of resource depletion, focusing on fuels like petrol and diesel. The NCERT Solutions provide clear answers to questions about different types of vehicles, their fuel requirements, and the impact of smoke emissions on health. Students will explore where oil is found in India, other resources extracted from the earth, and the various alternatives vehicles can use for energy. The solutions also address the problems caused by an increasing number of vehicles, such as traffic congestion and pollution, and suggest ways to manage these issues. Additionally, students will analyze the rising costs of fuel and understand the reasons behind price hikes. These solutions are designed to enhance understanding and aid in effective exam revision for Class 5 EVS.

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BoardCBSE
ClassClass 5
SubjectEnvironmental Studies
Session2026
LanguageEnglish
TypeNCERT Solutions
Chapter12 What If It Finishes

Chapter summary

Chapter 12, 'What If It Finishes?', for Class 5 EVS focuses on the importance of fuel resources. The NCERT Solutions cover identifying vehicles and their fuel needs, understanding the environmental impact of vehicle emissions, and exploring India's oil-producing regions. It also touches upon other underground resources and alternative energy sources for vehicles. The solutions discuss the consequences of increased vehicle numbers and suggest solutions like public transport and carpooling. Finally, it examines fuel price fluctuations and their causes, providing a comprehensive overview of resource management and conservation.

Learning outcomes

  • Identify different types of vehicles and their fuel requirements.
  • Understand the health and environmental impacts of smoke from vehicles.
  • Locate oil fields in India and identify other natural resources found underground.
  • Recognize alternative energy sources for vehicles.
  • Analyze the problems caused by an increasing number of vehicles.
  • Suggest solutions for managing traffic and pollution.
  • Comprehend the reasons behind rising fuel prices.

Topics covered

Paper topics

  • Vehicles and Fuel
  • Petrol and Diesel
  • Pollution from Vehicles
  • Health Impacts of Smoke
  • Natural Resources
  • Oil Fields in India
  • Alternative Energy Sources
  • Traffic Congestion
  • Noise Pollution
  • Resource Conservation
  • Fuel Prices
  • Sustainable Transport

Important topics

  • Impact of Vehicle Smoke on Health
  • Reasons for Increasing Fuel Prices
  • Alternative Fuel Sources for Vehicles
  • Solutions for Traffic and Pollution
  • Identifying Oil Fields in India

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Questions and Solutions

Look at the Picture and Write - Question 1

What are the different kinds of vehicles that you can see?
Solution: By carefully observing the picture, we can identify several types of vehicles. These include larger vehicles like buses, common personal vehicles such as cars and motorcycles, and smaller two-wheelers like scooters. Additionally, we can see auto-rickshaws, which are a popular mode of transport, and bicycles, which are human-powered.

Look at the Picture and Write - Question 2

What do you think they need as fuel?
Solution: Most of the vehicles seen, such as cars, motorcycles, scooters, auto-rickshaws, and buses, require fuel to operate. This fuel is typically petrol or diesel. However, a bicycle is different; it does not need any fuel because it is propelled by the rider's physical effort.

Look at the Picture and Write - Question 3

Which of the vehicles do you think give off smoke? Put a red mark on those.
Solution: Vehicles that run on petrol or diesel engines generally produce smoke as a byproduct of combustion. Therefore, the bus, car, motorcycle, scooter, and auto-rickshaw are the vehicles that give off smoke. The bicycle, being human-powered, does not produce any smoke. You should place a red mark on all vehicles except the bicycle.

Tell - Question 1

Do you ride a bicycle? If yes, where all do you go on it?
Solution: Yes, I do ride a bicycle. It's a very useful mode of transport for short distances. I use my bicycle for going to places like the school, the local playground for recreation, and the market to buy essentials.

Tell - Question 2

How do you come to school?
Solution: I come to school using my bicycle. It's a healthy and eco-friendly way to commute, and it helps me get some exercise before the school day begins.

Tell - Question 3

How do your family members go to work from home?
Solution: My family members use different modes of transport depending on their needs. My father usually travels to work by car, which offers convenience and comfort. My mother sometimes uses the bus or an auto-rickshaw for her commute. My uncle prefers to go to work on his motorcycle.

Tell - Question 4

What problems can we have from smoke coming out of vehicles?
Solution: The smoke emitted by vehicles contains harmful pollutants that can negatively affect our health and the environment. Breathing in this smoke can lead to various health issues, including persistent coughing, feelings of nausea, headaches, and more serious long-term problems like lung diseases.

Find Out - Question 1

Which states in India have oil fields?
Solution: India has several states where significant oil fields are located, contributing to the country's energy production. These states include Assam, Gujarat, Maharashtra, and Andhra Pradesh.

Find Out - Question 2

Besides oil, what else is found deep inside the earth?
Solution: The earth's crust contains a vast array of valuable resources besides oil. Deep inside the earth, we can find many important minerals. Examples of these include coal, which is used as a fuel; iron, essential for making steel; copper, used in electrical wiring; bauxite, the primary source of aluminum; and precious metals like gold.

Write - Question 1

What all can vehicles run on?
Solution: Vehicles can be powered by a variety of energy sources. The most common fuels are petrol and diesel. However, many vehicles also run on Compressed Natural Gas (CNG) and Liquefied Petroleum Gas (LPG). Increasingly, electric vehicles are becoming popular, running on electricity stored in batteries. Some advanced vehicles can even utilize solar energy.

Write - Question 2

What kinds of problems will we face, if the number of vehicles keep on increasing? For example, more traffic on the road. Talk to your elders and write about it.
Solution: If the number of vehicles continues to grow unchecked, we will face numerous significant problems. As mentioned, traffic on the roads will become much heavier, leading to longer travel times and frustration. This increase also directly contributes to higher levels of air pollution due to more exhaust fumes, and noise pollution from the constant engine sounds and horns. Furthermore, a greater number of vehicles on the road increases the likelihood of accidents. Managing parking spaces will also become a major challenge.

Question 4

Manju said, "why doesn't everyone use a bus?" What do you think, why don't people travel by buses?
Solution: People might choose not to travel by bus for several reasons. Buses can often become very crowded, making the journey uncomfortable. Some people, especially those with limited income, might prefer using a bicycle to save money on fares. On the other hand, wealthier individuals might opt for cars or motorcycles because they offer more convenience, privacy, and flexibility in travel times.

Question 4 (continued)

Suggest some ways to deal with the problems arising out of the growing number of vehicles.
Solution: To address the issues caused by the increasing number of vehicles, several measures can be adopted:
  1. Promote Public Transport: Encourage people to use public transportation like buses, trains, and metro services more frequently. This reduces the number of individual vehicles on the road.
  2. Encourage Carpooling: Promote the concept of carpooling, where multiple people share a single car for their commute. This significantly cuts down on the number of cars being used.
  3. Improve Infrastructure: Develop better roads and public transport networks to make commuting easier and more efficient.
  4. Promote Cycling and Walking: For shorter distances, encourage cycling and walking as healthy and eco-friendly alternatives.

Find Out and Write - Question 1 (Part 1)

How much oil? Scooter Car Tractor. How much petrol/diesel can be filled at a time? How far can it go on one litre of petrol/diesel?
Solution: Here's an approximate breakdown for different vehicles:
  • Scooter: Can typically hold about 10 litres of petrol and can travel approximately 40-50 kilometers per litre.
  • Car: Can hold a larger amount, around 40-60 litres of petrol or diesel, and generally travels about 15-20 kilometers per litre.
  • Tractor: Usually has a fuel tank capacity of 40-50 litres (diesel) and travels about 10-12 kilometers per litre.
Please note that these figures can vary based on the specific model and engine efficiency.

Find Out and Write - Question 1 (Part 2)

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

Oil | Rate of one litre in 2002 | Rate of one litre in 2007

Petrol | ₹ 28 | ₹ 47

Diesel | ₹ 18 | ₹ 33

Solution: Based on the provided table for Chennai:
  • In 2002, one litre of petrol cost ₹ 28, and in 2007, it cost ₹ 47.
  • In 2002, one litre of diesel cost ₹ 18, and in 2007, it cost ₹ 33.

Find Out and Write - Question 2

In.....years the rate of petrol went up by Rs......The rate of diesel increased by Rs......
Solution: Comparing the prices from 2002 to 2007:
  • The time period is 2007 - 2002 = 5 years.
  • The rate of petrol increased from ₹ 28 to ₹ 47. The increase is ₹ 47 - ₹ 28 = ₹ 19.
  • The rate of diesel increased from ₹ 18 to ₹ 33. The increase is ₹ 33 - ₹ 18 = ₹ 15.
So, in five years the rate of petrol went up by Rs. 19. The rate of diesel increased by Rs. 15.

Find Out and Write - Question 3

What was the difference in the rates of petrol and diesel in the year 2007?
Solution: In the year 2007, the rate of petrol was ₹ 47 per litre, and the rate of diesel was ₹ 33 per litre. The difference between these two rates is ₹ 47 - ₹ 33 = ₹ 14. Therefore, the difference in the rates was Rs. 14.

Find Out - Question 1

What is the price of petrol and diesel in your area?
Solution: The prices of petrol and diesel vary significantly from one area to another due to taxes and transportation costs. In my area, the current price of petrol is approximately ₹ 68 per litre, and the price of diesel is approximately ₹ 45 per litre. (Note: These prices are examples and may change.)

Find Out - Question 2

Why are the prices of petrol and diesel going up?
Solution: The prices of petrol and diesel are increasing primarily due to a imbalance between supply and demand. The production of crude oil, from which petrol and diesel are derived, is limited and takes a long time. However, the number of vehicles and the global demand for fuel are constantly increasing. When demand is higher than supply, prices naturally tend to go up.

Common mistakes

  • Not distinguishing between vehicles that need fuel and those that don't.
  • Underestimating the health effects of vehicle smoke.
  • Failing to consider alternative fuel sources.
  • Not suggesting practical solutions for traffic and pollution issues.

Revision tips

  • Review the list of vehicles and their respective fuels.
  • Focus on the health problems caused by vehicle smoke.
  • Understand the concept of resource depletion and conservation.
  • Practice calculating fuel price differences and increases.
  • Think about how you can contribute to reducing pollution.

Practice MCQs

Q1. Which of the following vehicles does NOT require fuel like petrol or diesel?

Q2. What is a major health problem caused by smoke from vehicles?

Q3. Which of these is NOT typically found deep inside the earth as a resource?

Q4. What is a suggested way to deal with the increasing number of vehicles?

Q5. Why are the prices of petrol and diesel increasing?

Frequently asked questions

What is the main theme of the Class 5 EVS chapter 'What If It Finishes?'

The chapter focuses on the importance of fuel resources like petrol and diesel, the problems caused by their overuse and pollution from vehicles, and the need for conservation and alternative solutions.

Which vehicles need fuel, and which do not?

Vehicles like cars, buses, motorcycles, scooters, and auto-rickshaws need fuel such as petrol, diesel, CNG, or LPG. Bicycles do not require any fuel as they are powered by human effort.

What are the health problems associated with smoke from vehicles?

Smoke from vehicles can cause respiratory issues like coughing, nausea, headaches, and long-term lung diseases.

Where are oil fields located in India?

Major oil fields in India are located in the states of Assam, Gujarat, Maharashtra, and Andhra Pradesh.

Why are the prices of petrol and diesel increasing?

The prices are increasing because the production of these fuels is limited, while their consumption is growing rapidly worldwide.

What are some ways to reduce problems caused by too many vehicles?

Solutions include using public transport more often, carpooling (sharing rides), and potentially using vehicles that run on cleaner energy sources.

Important links

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