Climate Change

Question 1

Human factors affecting climate change

Answer 1

The greenhouse effect

Question 2

Ice cores

Answer 2

locked inside ice are molecules and trapped air, which are preserved year on year as more snow falls. Subtle changes in temperature can be measured from ice cores extracted in Antarctica. This gives scientists long term evidence of climate change

Question 3

Rocks and fossils

Answer 3

these can be studied for information also covering longer time periods. For instance, limestone found in Yorkshire would have been formed on the bottom of a warm seabed millions of years ago.

Question 4

Glacial retreats

Answer 4

Glacial retreat - photographs, satellite images and staking the changing position of the terminus, or snout, at the end of a glacier show that many mountain glaciers have retreated in the last 50 years. However, this could partly be due to a lack of snowfall as well as glacial melting.