earth yr 8

Question 1

atmosphere

Answer 1

the mixture of gases surrounding the earth

Question 2

carbon sink

Answer 2

ares of vegetation, the ocean or the soil which absorb and store carbon

Question 3

climate change

Answer 3

a long term change in weather patterns

Question 4

combustion

Answer 4

a process where carbon based substance (e.g. fossil fuels) are burnt. This transfers carbon dioxide to the atmosphere

Question 5

electrolysis

Answer 5

using high temperatures and electricity to extract more reactive metals from their ores e.g. aluminium

Question 6

extraction

Answer 6

separating metals from their ores

Question 7

fossil fuel

Answer 7

a fuel made from the remains of animals and plants that died millions of years ago. Fossil fuels include coal, oil and natural gas

Question 8

global warming

Answer 8

the gradual increase in the average surface temperature of earth

Question 9

greenhouse gas

Answer 9

a gas that contributes to the greenhouse effect, such as carbon dioxide

Question 10

mineral

Answer 10

naturally occurring metals, and their compounds

Question 11

ore

Answer 11

naturally occurring rock that contains enough of a material to make it worth getting the mineral - and then the metal it includes - out of the rock

Question 12

carbon sink

Answer 12

a forest, ocean or other natural environment with the ability to store large amounts of carbon