Fossil Fuels

Question 1

Three main fossil fuels

Answer 1

Crude oil
Gas
Coal

Question 2

Formation of fossil fuels

Answer 2

Crude oil, gas- Dead Sea creatures buried under sand, over millions of years heat and pressure turns them into oil and gas

Coal- dead plants and trees buried under layers of mud, over millions of years heat and pressure turns them into coal

Question 3

Alternative energy sources to fossil fuels

Answer 3

Hydrogen
Solar energy
Wind power
Biogas
Hydropower

Question 4

Importance of fossil fuels to society

Answer 4

Natural gas – cooking and heating (radiators)

Crude oil – petrol and diesels for cars
-Jet fuel for aeroplanes

Coal– generating electricity

Question 5

Problems with burning fossil fuels

Answer 5

Acid rain- nitrous oxides react with water and oxygen in the atmosphere to form nitric acid, resulting in acid rain

Sulphur dioxide reacts with water and the atmosphere to form sulphuric acid resulting in acid rain

The greenhouse effect- the Sun emits light and heat which is then radiated back to earth
Some of it gets absorbed by CO2 trapping heat energy to the surface and increasing global temperature

Question 6

Advantages of the energy source hydrogen

Answer 6

Water is the only product

Question 7

Disadvantages of the energy source hydrogen

Answer 7

It is produced from the electrolysis of water (electricity dividing water into hydrogen and oxygen)