Energy basics
What is energy?
Energy is the ability to do work.
Name the two main types of energy sources.
✅ Renewable and non-renewable.
When you push a ball and it rolls, what energy is it showing?
✅ Kinetic energy.
Mechanical energy is made up of which two types of energy?
✅ Kinetic energy and potential energy.
Give one example of a renewable energy source.
✅ Solar / wind / water (any one).
In a kettle, electrical energy mainly changes into what form?
✅ Thermal (heat) energy.
Which type of energy does a moving object have?
✅ Kinetic energy.
Give one example of a non-renewable energy source.
✅ Coal / oil / natural gas (any one).
When you hold a pencil still in the air, what type of energy does it have?
✅ Potential energy.
Which type of energy does an object have because of its position?
✅ Potential energy.
Why is solar energy called renewable?
✅ Because it can be naturally replaced and does not run out.
A smartphone battery stores chemical energy. Name TWO forms it can change into when the phone is used.
✅ Light, sound, heat, or electrical (any two).
What happens to potential energy when a playdough ball rolls off a desk?
✅ It converts to kinetic energy.
Explain the difference between renewable and non-renewable energy sources.
✅ Renewable sources can be naturally replaced; non-renewable sources can run out and are not quickly replaced.
State the Law of Conservation of Energy.
✅ Energy cannot be created or destroyed, it can only transformed from one form to another. This is the law of conservation of energy.