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12 terms

GCSE climate change

STUDY
PLAY
Volcanic activity
can reduce global temperatures because of the dust and ash that goes into the atmosphere. These volcanic materials reflect incoming radiation back out to space cooling the Earth. The Mount Pinatubo eruption of 1991 resulted in cooling of 0.4C.
Sunspots
storms on the sun's surface that are marked by intense magnetic activity and play host to solar flares and hot gassy ejections from the sun. Increased sunspot activity has been noted at times of increased temperatures, and decreased activity in cooler times.
Variations in the way the Earth orbits the sun over time
The Earth's journey around the sun changes slowly over time, it does three things that sound like a dance - stretch, tilt and wobble!
Physical causes
Climate change created by natural changes on Earth
Human causes
Climate change caused by the actions of people
Burning fossil fuels
converts carbon in fossil fuels or plant materials from oil and gas back into carbon dioxide in the air.
Agriculture
uses a lot of fossil fuels in the production of fertiliser and pesticides, and in the transportation of food.
Farm animals
produce a lot of methane, a greenhouse gas
Greenhouse effect
Natural situation in which heat is retained in Earth's atmosphere by carbon dioxide, methane, water vapor, and other gases
Global warming
Anticipated increase in Earth's temperature, caused by carbon dioxide (emitted by burning fossil fuels) trapping some of the radiation emitted by the surface.
Climate change
Any change in measures of climate, such as temperature, precipitation, or wind, lasting for an extended period of a decade or longer.
Deforestation
if forests are cleared or disturbed, this carbon is released as carbon dioxide and other greenhouse gases