Climate change

Question 1

Effects of climate change

Answer 1

More droughts
More Heatwaves
Ice caps melting => sea level rise
More extreme weather events

Question 2

Climate change : C Milankovitch cycles

Answer 2

Milankovitch cycles
Eccentricity (change in orbit, 100,000 years)
Axial tilt (change in tilt 21.5 - 24.5, 41,000 years)
Precession (wobble, 26,000 years

Question 3

Climate change : C Volcanic activity

Answer 3

Super volcano eruption can release huge amounts of ash into atmosphere, blocking out sun.
E.G. 1783, Laki (Iceland) erupted
1788, French revolution started, caused by famine
of the population
Sulphur dioxide realised reacts with water to produce sulphur particles which reflect sunlight, cooling the earth

Question 4

Climate change : C Deforestation

Answer 4

Trees absorb CO2 during photosynthesis
Cutting trees stops them from photosynthesising
Realises CO2 from tree (if burnt)

Question 5

Climate change : C Agriculture

Answer 5

Causes deforestation
1/4 of methane produced by animals
Nitrous oxides realised when used as fertilisers

Question 6

Climate change : C Chlorofluorocarbons (CFC’s)

Answer 6

In all aerosol products until 1989 + fridges and freezers

Caused hole in ozone layer

Question 7

Climate change : C Fossil fuels

Answer 7

CO2 (Carbon dioxide)
CH4 (methane)
N2O (nitrous oxides)
The realise of these gasses causes THE ENHANCED GREENHOUSE EFFECT
Energy production causes 3/4 of CO2 emissions

Question 8

Climate change : R Alternate energy sources

Answer 8

Renewables. 37% of UK energy comes from renewables

Question 9

Climate change : R Afforestation

Answer 9

Planting of new trees
Trees act as carbon sinks
Profitable (orchids)
Wildlife returning

Question 10

Climate change : R Carbon capture and storage

Answer 10

CO2 is captured when it is realised from combustion
Put under pressure to turn into liquid
Stored in porous rock where gas originally came from
Impermeable layer of rock above keeps CO2 trapped

Question 11

Climate change : R Paris agreement

Answer 11

Helped developing countries (HIC => NEE/LIC)

Keeping climate change lower than 2°C

Question 12

Climate change : R COP 26

Answer 12

November 2021 - Glasgow
Purpose, to bring accelerated action to meet the goals of the Paris agreement
It is NOT LEGALLY BINDING

Question 13

Climate change : Adaptation agriculture

Answer 13

Rainfall and temperature will change
Lower latitudes will make less crops (nearer to equator)
Mid latitudes (UK ish) will increase in production.
UK => Mediterranean crops may thrive

Question 14

Climate change : Adaptation Managing water supply

Answer 14

Rainfall less consistent (intense storms and drought)

Himalayas. Millions rely on glacial meltwater => artificial glaciers (damming water to freeze)

Question 15

Climate change : Adaptation Rising sea levels

Answer 15

Highest point on Maldives in 2.4m above sea level => mostly submerged by 2070 (380,000 inhabitants)
Construction of sea walls
Artificial islands 3m above sea level so people can relocated
Houses on stilts