Chapter 7: Energy—How Things Work Short Questions | Environmental Science - EVS Class 5 CBSE

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Chapter 7: Energy—How Things Work Short Questions | Environmental Science - EVS Class 5 CBSE | ByteNotes.in

Short Answer

Easy difficulty • Direct answer format

Easy

Question 1

Quick Recall

What is the simple definition of energy according to the textbook?

Energy is described as something that makes things move or light up.
It is also the force that allows objects to produce sound or do work.
Finally, energy is what helps things change their temperature by getting warmer or cooler.

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Short Answer

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Easy

Question 2

Quick Recall

How does food act as a source of energy for our bodies?

Food gives us the energy we need to stay active and ready to play.
If we do not eat, we may feel tired because our energy levels drop.
Our bodies also store energy from food so we can move even if we skip a meal.

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Short Answer

Medium difficulty • Direct answer format

Medium

Question 3

Quick Recall

What happens when you release the mouth of a blown-up balloon?

The air rushes out of the balloon very quickly.
The rushing air generates energy that pushes the balloon forward.
This simple activity shows how moving air can create movement.

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Short Answer

Medium difficulty • Direct answer format

Medium

Question 4

Quick Recall

How is sound energy produced using a rubber band?

When you pluck a stretched rubber band, it starts to vibrate.
These vibrations create what is known as sound energy.
You can hear the sounds produced by these vibrations clearly.

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Short Answer

Easy difficulty • Direct answer format

Easy

Question 5

Quick Recall

Why does a cup of water kept in the sunlight become warmer?

The Sun provides heat energy to the objects it shines upon.
This heat energy is absorbed by the water in the cup.
As a result, the water in the sunlight becomes warmer than water kept in the shade.

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Short Answer

Hard difficulty • Direct answer format

Hard

Question 6

Quick Recall

How do people in cold regions like Ladakh stay warm using animals?

People keep their cattle on the ground floor of their houses.
The body heat from these animals rises to the floor above where the family lives.
This is a clever way to stay warm without using extra electricity or firewood.

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Medium

Question 7

Quick Recall

What does the brain use energy for even when we are sleeping?

The brain requires energy to keep functioning even when the body is at rest.
It uses energy while we are simply sitting or thinking.
This shows that energy is needed for internal body processes, not just movement.

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Short Answer

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Easy

Question 8

Quick Recall

Name two fuels used for vehicles and one fuel used for cooking.

Petrol and diesel are common fuels used to keep vehicles running.
Cooking gas is a fuel widely used in homes for preparing food.
Some people also use coal or wood as a fuel source for cooking.

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Short Answer

Medium difficulty • Direct answer format

Medium

Question 9

Quick Recall

What is the disadvantage of using wood or coal as fuel?

Burning these materials creates a lot of smoke.
This smoke leads to pollution in our environment.
Because of these harmful effects, we must use these fuels very carefully.

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Short Answer

Medium difficulty • Direct answer format

Medium

Question 10

Quick Recall

In the diya experiment, why does one diya burn longer than the other?

The diya with oil burns longer because the oil acts as a fuel.
A plain cotton wick without oil has no fuel to keep the flame going.
This proves that fuel is necessary to produce light for a long time.

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Easy

Question 11

Quick Recall

List three things in a home that can run on electricity.

A fan uses electricity to create movement and blow air.
Bulbs or LED lights use electricity to provide light.
A radio or speaker can use electricity to produce sound.

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Short Answer

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Medium

Question 12

Quick Recall

Why is it important to use electricity carefully?

Electricity is very useful but it can also be dangerous.
Touching plugged-in devices or broken wires can cause harm.
Safety rules, like not putting fingers in sockets, help prevent accidents.

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Short Answer

Hard difficulty • Direct answer format

Hard

Question 13

Quick Recall

What is meant by 'energy efficiency'?

It means using less energy to do the same amount of work.
This process helps us save natural resources and reduces waste.
Using LED bulbs instead of older bulbs is a great example of this.

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Chapter sections

Chapter 7: Energy—How Things Work | Short Questions

What is the simple definition of energy according to the textbook?

How does food act as a source of energy for our bodies?

What happens when you release the mouth of a blown-up balloon?

How is sound energy produced using a rubber band?

Why does a cup of water kept in the sunlight become warmer?

How do people in cold regions like Ladakh stay warm using animals?

What does the brain use energy for even when we are sleeping?

Name two fuels used for vehicles and one fuel used for cooking.

What is the disadvantage of using wood or coal as fuel?

In the diya experiment, why does one diya burn longer than the other?

List three things in a home that can run on electricity.

Why is it important to use electricity carefully?

What is meant by 'energy efficiency'?

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