NCERT Revision Notes for Class 5 EVS Chapter 7: Energy — How Things Work – Free PDF Download

Chapter 7 of Class 5 EVS (Our Wondrous World), Energy — How Things Work, explains what energy is and the different forms it takes in everyday life.

Key Concepts

What energy is: whatever makes things move, shine, make sound, or become hot or cold.

Forms of energy: heat, light, sound, and electrical energy.

Natural energy sources: the Sun (solar energy), wind, and flowing water; fuels like wood, coal, and petrol.

Quick Recap

• A moving fan uses electrical energy converted into motion (and some sound).
• Solar, wind, and water energy are all renewable, unlike fuels such as coal and petrol.

Common Mistake to Avoid

Thinking energy is only about electricity — heat, light, and sound are also forms of energy, even without any wires or batteries involved.

Frequently Asked Questions

What is the difference between renewable and non-renewable energy sources?
Renewable sources (sun, wind, water) can be used again and again without running out; non-renewable sources (coal, petrol) are limited and get used up.

Can one activity involve more than one form of energy?
Yes — a running fan, for example, involves electrical energy (to power it), motion energy (the blades turning), and some sound energy too.

Full walkthrough: Chapter 7 Solutions · Extra Questions.

Written by Satish

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