Topic 11a Energy & Electricity Flashcards Preview

GR 5 - Science & Technology > Topic 11a Energy & Electricity > Flashcards

Flashcards in Topic 11a Energy & Electricity Deck (20):
1

What is electricity?

It is a type of energy

2

Key Words : Electrochemical cell

It changes the energy in chemicals - into electricity

3

Key Words: Battery

A sourceOf stored energyThat is made of one or more cells

4

Key Words: Switch

Something that controlsThe electricityIn an electric circuit

5

Key Words: Electrical Circuit

A system That provides a pathFor the transfer of electricity

6

A battery has two ends - what is different about the two ends?

One side is positiveThe other side is negative

7

How does a torch use energy?

By changing electrical energy into light energy (and some heat energy)

8

What has happened to make a battery flat?

All the energy in a cell has been transferred.

9

Can you recharge a battery? If yes, how?

Yes but you must buy rechargeable batteries. By plugging them into and electrical point.

10

Why must we dispose of old batteries carefully?

Because they contain harmful chemicals

11

Why should you never put batteries in a fire?

They can explode.

12

Electrical energy is transferred in a .....

Circuit

13

Describe how a circuit works by using a torch a an example.

The parts of the torch that carry the electricity are joined together in a LOOPIt begins and ends at the battery

14

What is the function of the circuit

To take the electrical energy from the energy sourceTo where it is needed

15

Why do some electrical appliances not work?

Because the electrical circuit could be broken

16

Key Words: Electricity Box

The place where electricity from a substationIs connectedTo the electrical circuits in a building

17

Key Words: Wall Socket

The part of the wallWhere an electrical appliance Can be connected to an electrical circuit

18

Key Words: Plug

The part of an electrical applianceThat can be connectedTo a wall socket

19

Key Words: Turbine

A rod that turnsWith bladesArranged like a wheel around it

20

Key Words: Generator

A machine that produces electricity