1.3 Global Climate Change

Question 1

What is the Greenhouse Effect?

Answer 1

The way that gases in the atmosphere trap heat from the Sun. Let heat in but prevent most of it from getting out.

Question 2

What are 4 human activities causing enhanced greenhouse effect?

Answer 2

Agriculture , Energy , Transport , Industry

Question 3

How does agriculture contribute?

Answer 3

Farming off Livestock and Rice Paddies emit Methane. (21 times more powerful than CO2)
When trees are cleared, it leaves CO2 in atmosphere as they absorb CO2.

Question 4

How does Energy contribute?

Answer 4

When fossil fuels like coal, oil and natural gas are burnt, it releases Carbon Dioxide (89% of greenhouse gases.
Most our energy comes from greenhouse gases.

Question 5

How does Transport contribute?

Answer 5

Many vehicles such as planes and cars release Nitrous Oxide.
Car ownership is increasing which means more cars on the roads.

Question 6

How does industry contribute?

Answer 6

They use a lot of energy and gases such as Hallocarbons (3000 time more powerful than CO2)
Some processes also release greenhouse gases.

Question 7

What are some Consequences of Climate Change?

Answer 7

Impacts Farming
Can Cause Deaths
Lower crop yields
More extreme weather events

Question 8

What are 3 pieces of evidence suggesting human activity is causing climate change?

Answer 8

Global Temperature Rise
Decline in Arctic Sea Ice
Sea Level Change

Question 9

Global Temperature Rise

Answer 9

Steep rise in global temperatures recently
Has increased by 1°C since 1880.
10 warmest years have been since 2000.

Question 10

Decline in Arctic Sea Ice

Answer 10

Extent of Arctic Sea Ice has decreased by more than 3% each decade.
Higher temperatures mean more ice is melting.

Question 11

Sea Level Change

Answer 11

0.2m rise since 1901.
Glaciers/ Ice sheets melting causes sea levels to rise.
Thermal expansion.