Climate change

Question 1

What 2 weather events are becoming more prevalent and why?

Answer 1

Droughts-more evaporation from the Atlantic Ocean-more storm events-example 2022 heatwave-temps reached 40°C
Flooding-higher temperatures and increased evaporation-example 2008 flooding

Question 2

1)What time period are we in the geological timescale and when did it start?

2)What Epoch are we in?

Answer 2

1)
* The Quaternary period
* It started 2.6 million years ago

2)
* The Holocene Epoch

Question 3

How long do glacials last?

Answer 3

100,000 years

Question 4

How long do inter-glacials last?

Answer 4

10,000 years

Question 5

Give 6 sources of evidence for climate change

Answer 5

1. Global temperatures rising(0.55°C since 1970)
2. Global sea level rise(10-20m over last 20 years
3. Arctic sea ice decline(50% less then 30 years ago)
4. Arctic ice cores(shows data from over 800,000 years ago with oxygen isotopes)
5. Glacial retreat shown in photos
6. Changing seasonal patterns in bird migration and trees flowering

Question 6

Give and briefly explain 3 natural causes of climate change

Answer 6

1. Milankovich cycle-eliptical orbit of the earth
2. Super volcanoes and volcanoes eruoting releasing S02 into the atmosphere which reacts with water vapour making an aerosol
3. Sun spots and solar flares cause lower and higher solar output

Question 7

Give 5 human causes of climate change

Answer 7

1. Cows producing methane
2. Paddy fields producing methane
3. Cars and transport producing CO2
4. Factories produce CO2
5. Deforestation and burning wood destroys a carbon sink

Question 8

What is the difference between the greenhouse effects and the enhanced greenhouse effect?

Answer 8

Greenhouse effect is natural, giving enough warmth to survive
Enhanced is not natural, giving too much heat

Question 9

What are 6 social impacts of climate change?

Answer 9

1. Agriculture affected in South Asia
2. Higher crop growth in Europe
3. Extreme weather increase
4. Higher Sea levels meaning more shipping
5. America’s crop yeilds falling up to 12%
6. Decline in winter related illness

Question 10

What are 5 enviromental impacts of climate change?

Answer 10

1. Sea levels rise
2. Wildlife declines
3. Coral reefs could be lost
4. 70% of Asia at risk from flooding
5. Forests in North America more at risk from disease

Question 11

(4)Mitigation strategies

Answer 11

1. Alternate energy sources
2. Carbon capture
3. Aforestation
4. International agreements

Question 12

(3)Adaptation strategies

Answer 12

1. Managing water supply
2. Reducing risk from rising sea levels
3. Changes in agriculture