Flashcards
GCSE Geography Climate change
Cards in this deck (11)
- 1Orbital changeAffects how much sunlight we receive.
It takes 100,000 years for the earths orbit to change from being more circular, to an ellipse, and back again.
It takes 41000 years for the earths axis to tilt, straighten up, and tilt back again. - 2Solar outputSun spots cause an uneven temperature on the suns surface.
Temperatures are greater when there are plenty of sunspots. - 3Volcanic activityMajor volcanic eruptions lead to a brief period of global cooling, due to ash being ejected into the atmosphere and blanketing the earth.
- 4The little ice ageUnusual cold conditions between 1300-1850 AD.
Increased illness and famine.
Livestock survival and crop productivity decreased.
Food cost increased. - 5MethaneReleased by:
swamps
landfill
farming cattle - 6Nitrious oxideReleased by:
combustion of fossil fuel
sewage treatment
wet tropical forests - 7Water vapourCondense into clouds which reflect solar radiation- cooling effect.
As temperatures rise more water evaporates from ground sources. - 8Carbon dioxideReleased by:
burning fuel
deforestation
cement production - 9OzoneCauses warming and cooling effect.
Levels nearly doubled since the 1800's.
Released by:
car emissions
industrial pollution - 10HalocarbonsUsed primarily as cooling agents, propellants and cleaning solvent.
CFCs
HFCs - 11BangladeshHigher temp melts snow from Himalayas- causes increased flooding and river erosion.
Crops are destroyed.
Low lying land- floods easily.
Cannot afford protection from flooding.
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- Flashcards on GCSE Geography Climate change, created by natalie.porter24 on 18/11/2014.
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