Energy

Question 1

How do appliances or machines transfer energy from one form to another?

Answer 1

• A kettle transfers electrical energy into heat energy and sound energy
• A petrol mower transfers chemical energy stored in petrol or diesel into kinetic energy, heat energy and sound energy

Question 2

What is the law of conservation of energy?

Answer 2

Energy cannot be created or destroyed. It can only be transferred from one form to another.

Question 3

What are the different ways energy can be stored?

Answer 3

Chemical energy- stored inside food, fuels and batteries
Nuclear energy- stored inside the nucleus of atoms
Elastic potential energy- stored in anything that is stretched or squashed
Gravitational potential energy- stored in any object that is higher than its surroundings