Natural Sciences and Technology Grade 5-B ... - Thunderbolt Kids

KEY CONCEPTS
Never stick a metal knife
into a toaster while it is on.
First turn the toaster o and
unplug it and use awooden
or plastic knife. "Remember,
electricity can flow through
metals
• Energy can be stored in cells and batteries.
• The cells or batteries are a source of electrical energy for
an electric circuit.
• An electrical circuit is a system that transfers electrical
energy to where it is needed.
• A power station needs asource of energy.
• Electricity from the power station is transferred in a circuit
to our homes.
• Electricity can be dangerous and needs to be used safely.
REVISION:
1. Why do torches need cells (battery) to operate?
Cells (battery) are a source of energy for the torch. Chemical
energy is stored in the battery which is changed into electrical
energy and then light energy as the light glows.
2. What is an electric circuit?
An electrical circuit is apathway that allows electricity to flow
or a system that allows electrical energy to move
40 Energy and Change