7.3 Global warming

Question 1

what is a greenhouse gas?

Answer 1

gases in the Earth’s atmosphere that trap heat

Question 2

what are the four main greenhouse gases?

Answer 2

carbon dioxide, methane, nitrous oxide and fluorinated gases

Question 3

what do greenhouse gases do?

Answer 3

block excess heat from space

Question 4

what is global warming?

Answer 4

rising temperatures on Earth

Question 5

results of global warming

Answer 5

melting of ice caps, rising sea levels, increased coastal flooding, unusual patterns and ocean currents

Question 6

what is the initial cause of global warming?

Answer 6

the growing dependence of fossil fuels since the Industrial Revolution

Question 7

links between carbon cycle and global warming

Answer 7

all plants undergo photosynthesis (intake and outtake of CO2)

Question 8

links between decomposition and global warming

Answer 8

CO2 is released from dead organisms

Question 9

carbon cycle

Answer 9

photosynthesis (respiration), death, formation and burning of fossil fuel

Question 10

what happens to some excess CO2

Answer 10

dissolves in the sea and absorbed by sea plants and other photosynthetic organisms

Question 11

what are rising sea levels caused by?

Answer 11

caused by melting glaciers and warming of ocean water