Term 3

Question 1

Electricity is also called ____________.

Answer 1

Electrical energy

Question 2

Machines and appliances need an _______ of energy before they can provide an ________ of energy.

Answer 2

Input… output

Question 3

Electrical appliances need _________ to work.

Answer 3

Electricity

Question 4

Give an example of output energy

Answer 4

Light, sound, heat or movement

Question 5

Which of the following can NOT be changed into electricity: sunlight, water, coal, chemicals or sound

Answer 5

Sound

Question 6

What changes the energy in chemicals into electricity

Answer 6

Electrochemical cells

Question 7

How many cells is a battery made of?

Answer 7

One or more

Question 8

What happens a torch is switched on?

Answer 8

The chemical energy in the cells is changed into electricity

Question 9

In a torch, what changes the electricity into light energy?

Answer 9

The bulb

Question 10

What are the two ends of the cell called?

Answer 10

The negative end and the positive end

Question 11

What are the positive and negative ends sibolized as?

Answer 11

+ and -

Question 12

The energy that makes a torch shine is stored in a _________.

Answer 12

Cell

Question 13

The positive end of the battery must touch the __________ end of the next battery.

Answer 13

Negative

Question 14

True or False: To make the torch work, the cells must be put in the right way.

Answer 14

True

Question 15

Why do we need to dispose of old batteries?

Answer 15

Harmful chemicals leak out of old batteries

Question 16

Why do we need to dispose of old batteries?

Answer 16

Harmful chemicals leak out of old batteries

Question 17

What will happen if you put batteries in a fire?

Answer 17

They will explode

Question 18

True or False: If part of the electrical circuit is broken, the appliance runs on it’s backup energy stored inside it.

Answer 18

False. If part of the electrical circuit is broken, the appliance will stop

Question 19

What is the symbol for a battery?

Answer 19

In a circuit the battery is shown as two lines next to each other. The one on the left is longer

Question 20

What is the symbol for a bulb?

Answer 20

In a circuit the bulb is shown as a circle with an x inside of it

Question 21

What is the symbol for a switch?

Answer 21

In a circuit the switch is shown as either two dots with a line connecting them ( if it’s closed) or two dots with a line leading diagonally down from the one

Question 22

What is the order of the buildings in a national grid?

Answer 22

Power station, step-up transformers, pylon, step-down transformers and finally the consumers.