Causes Of Climate Change

Question 1

How much have quantities of greenhouse gases increased by since 1750?

Answer 1

25%

Question 2

In the 1980s ___% of CO2 emissions have come from burning fossil fuels

Answer 2

75%

Question 3

What does oxygen combine with to make greenhouse gases?

Answer 3

Carbon and nitrogen

Question 4

Increasing global temperatures leads to more _____ ______ which leads to _____ ______ which leads to more heat being trapped in the atmosphere

Answer 4

Water vapour, cloud cover

Question 5

What is the next step in the natural greenhouse effect: the sun gives off radiation

Answer 5

The earth and atmosphere intercept this radiation and 30% is reflected back by snow and clouds

Question 6

Some radiation is absorbed…

Answer 6

Some is re-emitted by greenhouse gases

Question 7

What are milankovitch cycles

Answer 7

Variation in the earths tilt/orbit/eccentricity (degree of roundness)

Question 8

Does a greater tilt produce more or less varied seasonal climate

Answer 8

More

Question 9

How often does the earths orbit change

Answer 9

100,000 years

Question 10

How often does the earths axis change?

Answer 10

41,000 years

Question 11

How many ice ages has earth had over the last 800,000 years

Answer 11

8

Question 12

What are 3 examples of causes of climate change?

Answer 12

(Enhanced) Greenhouse effect
Changes in solar output
Milankovitch cycles