Energy

Question 1

What are fuels?

Answer 1

Materials such as wood, coal, gas and oil that are burned to produce energy

Question 2

Where does the stored energy in wood come from?

Answer 2

Light energy from the sun, carbon dioxide, water and nutrients from soil, which is stored as glucose sugar in the tree.

Question 3

What are natural gas and petroleum made from?

Answer 3

Tiny sea organisms that sank to the bottom of the ocean where they were buried under sand and over time changed into crude oil and natural gas

Question 4

What 4 things are made from crude oil?

Answer 4

Petrol, diesel, paraffin and candle wax

Question 5

What does a fuel need to start burning?

Answer 5

Input energy
Oxygen
Fuel

Question 6

How much of the air is oxygen?

Answer 6

21%

Question 7

Give 3 examples of fuels we use regularly.

Answer 7

Coal
Oil
Parrafin

Question 8

Alternative power station types?

Answer 8

Hydro electric power
Nuclear
Wind

Question 9

Different forms of energy?

Answer 9

Chemical 
Light
Heat
Kinetic 
Electrical
Sound
Gravitational

Question 10

When were wheels invented?

Answer 10

5000BC

Question 11

What is a free turning axle?

Answer 11

An axle in a bearing that rotates with the wheel

Question 12

What is a fixed axle?

Answer 12

The axle is fixed to the body of the vehicle and the wheel turns freely