4.3

Question 1

Greenhouse effect

Answer 1

The process by which heat is trapped near the Earth’s surface by GHG

Question 2

Greenhouse gases

Answer 2

gases in the earth’s atmosphere that trap heat

Question 3

Positive feedback loop

Answer 3

Output serves to amplify initial disturbances

Question 4

Negative feedback loop

Answer 4

output acts to negate the effects of the initial disturbances

Question 5

what do greenhouse gases do

Answer 5

absorb the sun’s heat that radiates from the Earth’s surface, trap it in the atmosphere and prevent it from escaping into space

Question 6

Why is the greenhouse effect important

Answer 6

to keeping our planet at a suitable temperature for life

Question 7

How have humans affected the greenhouse effect

Answer 7

Burning fossil fuels, cutting down forests and farming livestock

Question 8

What ice cores tell us about the patterns of CO2 and temperature for the past 800,000 years

Answer 8

They tell us about the patterns and the amount of CO2 concentration