This document discusses different forms of energy and examples of how energy is used. It explains that some machines require human energy to operate through pushing, pulling, or turning, while other more complex machines require battery or electrical energy. It provides examples of items that produce heat, light, and sound as different forms of energy. The document also discusses renewable energy sources like wind, water, and solar that are better for the environment since they do not run out, compared to non-renewable sources like coal and natural gas that are finite resources.

1. How does it work?

2. Some tools and simple machines need our energy
to work.

3. We can turn a tin opener.

4. We can twist a screwdriver.

5. We can push a trolley.

6. We can pull a saw.

7. Some complex machines need energy from
batteries or mains electricity.

8. Let’s see!
This is a plug. This is a socket.This is a switch.
These are cables.

9. These items need batteries to work.

10. These items need mains electricity to work.

12. You know that we use our energy to push and
pull things.

13. You also know some objects use electrical
energy to work.

14. Heat, light, and sound are also forms of
energy.

15. The Sun, a candle
and a heater
produce HEAT

16. A light bulb, a torch
and the Sun
produce LIGHT.

17. A radio, a guitar
and a telephone
produce SOUND

18. Can you add more examples?

19. Energy from the world around us.

20. Wind, water, and the Sun produce energy we can use.
This energy is good for the environment.

21. This energy is always there and doesn’t run out.

22. Solar panels.

23. Windmills.

24. Hydro power station.

25. We get coal from the ground.
The coal will run out.
This is bad for the environment.

26. We get natural gas from the ground.
Natural gas will run out.
This is bad for the environment.