Page 112 - Science - 5

Clear Approach
Clear Approach

Write ‘T’ for true and for false statements : ‘F’

1. Heat energy can change the state of matter.
2. Trucks and buses use diesel for energy.
3. Petroleum is used to create steam to produce electricity.

4. Food stored inside the body is a form of mechanical energy.
5. Renewable source of energy is also called the alternative source of energy.

Substituting Yourself
Substituting Yourself

Give one word for each one of the following :

1. The energy produced by falling of water ___________
2. Methods to protect and preserve energy ___________

Brush Up Your Learning
Brush Up Your Learning

A. Define the following in one line :
1. Muscular energy 3. Solar energy

2. Wind energy 4. Non-renewable sources of energy
B. Answer the following questions :

1. What are chemical and mechanical energies?
2. What is energy? Why do we need energy?
3. What do you mean by conservation of energy?

4. What do you mean by renewable sources of energy?
5. What is hydroelectricity?

One Among All Multiple Choice Questions (MCQs)
One Among All Multiple Choice Questions (MCQs)

Tick ( ) the correct option : ü
1. Biogas is smokeless and does not causes ___________ .

(a) pollution (b) impurity
(c) dirtying (d) fouling

2. Petrol is the most common source of ___________ .
(a) inactivity (b) efficacy

(c) power (d) energy
3. Food stored inside the body is a form of ___________ .

(a) chemical energy (b) mechanical energy

(c) muscular energy (d) energy

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