Climate change info only

Question 1

what are the evidences for climate change

Answer 1

• ice sheets are dug out of the ice and analysed for CO2 trapped in the ice which shows the levels of CO2 then
• ocean sediments are dug up and O2 trapped in the sediments can help to calculate the temp then
• historical records like pictures show the climate f earth back then
• sea level rising at rapid rates as ice sheets melt due to warmer temperatures
• ice sheets shrinking

Question 2

what are some natural causes of climate change and explain how it works

Answer 2

• volcanic eruptions - produce ash, sulphur dioxide and carbon dioxide which go into the air which blocks sunlight from reaching the earth and so cools it. (I double checked this and it is correct)
• ocean currents (el nino and la nina) distribute heat around the earth.
• MIlankovitch cycles - earths orbit around the sun changes from being circular to more elliptical which can change how much sunlight reaches the earth
• solar activity - sunspots are dark areas on the sun which emit more sunlight than areas with no sunspot

Question 3

what are some human causes of climate change

Answer 3

• deforestation - burning trees releases the CO2 stored in the trees + fewer trees
• agriculture - rice fields have increased which increases the methane levels in the atmosphere
• fossil fuels - coal, oil and gas have been burnt which increases the CO2 levels in the atmosphere

Question 4

what is the enhanced greenhouse gas effect

Answer 4

CO2 in the air traps infra red radiation from the sun high up in the atmosphere causing increased temperatures

Question 5

what are the social impacts of climate change worldwide

Answer 5

• people living in small islands prone to flooding have to move like Tuvalu
• people are suffering from frequent floods
• people will lose their homes to floods

Question 6

what are the economic impacts of climate change worldwide

Answer 6

• cities like London and NY could be affected by flooding
• agricultural land can be lost in places like Bangladesh
• transport systems (ports) could be damaged

Question 7

what are the environmental impacts of climate change worldwide

Answer 7

• freshwater sources could become polluted with sea water
• damage to coral reefs by storms
• salt marshes could be destroyed by storms which act as a natural barrier to coastal erosion

Question 8

what are the social impacts of climate change in the UK

Answer 8

• elders could suffer due to hotter summers and heat waves
• flooding affects housing

Question 9

what are the economic impacts of climate change in the UK

Answer 9

• ski resorts may be forced to close as the ice melts
• increased yields of wheat and potatoes
• industries on coastal mudflats are vulnerable to sea rise

Question 10

what are the environmental impacts of climate change in the UK

Answer 10

• trees and flowers bloom earlier
• commercial crops need to be grown further North
• flooding can destroy farmlands and habitats of animals