Fuels

Question 1

Fuels

Answer 1

A substance that burns in oxygen and produces heat

Question 2

Fossil fuels

Answer 2

Formed from the remains of organisms that lived millions of years ago.

Organic compounds made of living things

Question 3

Hydrocarbons

Answer 3

When burned carbon dioxide and water vapour is produced

Question 4

The fire triangle

Answer 4

Oxygen, heat, fuel is needed to make a fire

Question 5

Fossil fuels +____________=water vapour+________________

Answer 5

Fossil fuels + oxygen= water vapour and carbon dioxide- hydrocarbons

Question 6

Coal

Answer 6

Formed from trees and ferns that died and were buried and compressed under swamps

Question 7

Oil

Answer 7

Formed from animals and plants that lived in the sea. Their remains were buried under layers of sand on the sea bead. As the pressure increased, they eventually formed oil

Question 8

Greenhouse effect

Answer 8

Some sunlight that hits the earth and is reflected. Some becomes heat.

CO2and other gasses in the atmosphere trap heat, keeping the earth warm

Question 9

Acid rain

Answer 9

Acid gasses (sulphur dioxide and nitrogen oxides released into the atmosphere)
Gas dissolves in rain water to form acid rain, acid rain kills plant life and pollutes rivers

Question 10

Sulphuric acid

Answer 10

When coal burns it turns into sulphur dioxide, the gas dissolves in rainwater forming sulphuric acid

Question 11

Nitric acid

Answer 11

Car exhausts emit oxides of nitrogen. They dissolve in water vapour in the atmosphere and form nitric acid

Question 12

3 effects of acid rain

Answer 12

Kills plant life

Pollutes rivers

Erodes stone work