1.3A - Climate Change Flashcards
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What is climate change?
The change in CLIMATE over a PERIOD of time.
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Explain how ice cores show evidence of climate change.
- EXTRACT ice core.
- Analyse how many bubbles are present
- MORE bubbles = OLD
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Explain how tree rings show evidence of climate change.
- EXTRACT a SECTION of a tree’s trunk.
- The trees have rings.
- WIDER RINGS = Warm, wet climate.
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Describe the changes in orbital ECCENTRICITY.
Natural cause of climate change.
- Earth orbits around sun
- Circular –> Elliptical –> Circular
- Every 100k years.
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Describe the changes in orbital obliquity.
Natural cause of climate change.
- Change in the earth’s axis.
- 21 –> 24 degrees
- Every 41k years.
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Describe the changes in orbital precession.
Natural cause of climate change.
- Wobbling of the Earth’s axis
- Every 161k years
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How does volcanic activity affect climate change.
Natural cause of climate change.
- Lets out LARGE quantities of MATERIALS.
- Some REFLECT sun’s rays BACK INTO SPACE.
- Causing changes in temperature.
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Explain how burning fossil fuels contributre to climate change?
Human cause of climate change.
- CO2 released into atmosphere.
- CO2 levels rise
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Explain how farming can contribute to climate change.
Human cause of climate change.
- Farming livestock produces lots of METHANE
- Methane is a GHG
- Contributes to global warming
- Affects climate change.
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Explain how deforestation affects climate change.
Human cause of climate change.
- Deforestation = chopping down of trees
- CO2 RELEASED into atmosphere.
State two environmental effects about climate change.
- Warmer temperatures
- Rising sea levels
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Explain how a population is able to mitigate climate change.
- Carbon capture
- Capturing and TRANSPORTING CO2 deep UNDERGROUND
- Reduces CO2 emissions.
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How might a population adapt to climate change?
- Improve flood warning systems.
- Implement physical barriers : sea walls.
- Able to mitigate rising sea levels.
