Energy & Electricity

Question 1

The cells in a battery have the ability to produce energy. What kind of reaction is happening in the battery for it to produce energy?

Answer 1

A Chemical reaction.

The chemicals in the cell react with each other

Question 2

Plastic is a good INSULATOR, why do we say this?

Answer 2

Plastic does not allow electricity to pass through

Question 3

General knowledge: What is the name of the Nuclear power station in the Western Cape?

Answer 3

The Koeberg Nuclear Power Station

Question 4

General knowledge: What fuel does Koeberg Nuclear Power Station use to create energy?

Answer 4

URANIUM is the fuel Koeberg Nuclear Power Station uses, because it has lots of stored energy.

Question 5

How can we use wind to create energy?

Answer 5

Wind Turbines on a wind farm create energy from the wind. wind blows against the blades that makes them move to produce energy.

Question 6

General knowledge: What number volt electricity does ESKOM supply to our homes?

Answer 6

240V

Question 7

When wood is burnt what type of energy is released?

Answer 7

Heat energy - for warmth & cooking

Light Energy - to see in the dark

Question 8

The energy in ………………. makes cars able to move.

Answer 8

Petrol

Question 9

What is the difference between renewable energy & non renewable energy?

Answer 9

Renewable energy can be replaced & non renewable energy can not?

Question 10

What type of energy is wind energy?

Answer 10

Kinetic energy

Question 11

What is the main source of heat energy for all living things?

Answer 11

The sun

Question 12

What type of energy do we get from the sun, the moon, fire etc

Answer 12

Light energy

Question 13

Is wood a renewable energy source?

Answer 13

yes it is because trees can be regrown

Question 14

Is coal a renewable energy source?

Answer 14

No it is not because coal will eventually run out and can not be replaced.

Question 15

What is potential energy?

Answer 15

This is when energy is stored and can be used later.

eg a wound up elastic band, wind up a toy

Question 16

Give 2 examples of light energy we find in our homes

Answer 16

TV, torches, I-pads, fire place, lights.

Question 17

We use our ears to hear what kind of energy?

Answer 17

Sound energy

Question 18

An elastic band can be stretched and when it is let go the energy is …………………….

Answer 18

An elastic band can be stretched and when it is let go the energy is RELEASED

Question 19

What is Kinetic energy.

Answer 19

Kinetic energy is MOTION energy, movement.

Question 20

I am playing with a YoYo, what kind of energy am I using?

Answer 20

A YoYo on a table has potential energy, and when you pick it up and play with it, it has Kinetic energy