5. the greenhouse effect and global warming

Question 1

1. gases in atmosphere that contain C=O C-H or O-H bonds absorb
2. what do they do
3. what is this called

Answer 1

1. infrared radiation (heat)
2. re-emit it in all directions
3. greenhouse effect

Question 2

main green house gases

Answer 2

water vapour
carbondioxide
methane

Question 3

what does higher concentrations of greenhouse gas mean

Answer 3

more heat trapped

earth getting warmer (global warming)

Question 4

global warming is thought to be responsible for

Answer 4

shrinking of polar ice caps

unpredictable weather

Question 5

scientific evidence for increase in global warming

Answer 5

earths average temperature increased in last 50 years

CO2 levels have increased as same time

Question 6

how have humans caused an enhanced green house effect

Answer 6

more idustrialised
burning fossil fuels releasing CO2
deforestation (which originally absorbed CO2)
farmins, cows, methane

Question 7

e.g. of how gov are working to reduce greenhouse has emmisions

Answer 7

uk gov policies to use more renewable energy supplies e.g. wind and solar farms