How do ice cores show climate change?
Trapped gases in ice reveal past temperatures.
How do tree rings provide evidence of climate change?
Wider rings mean warmer years, thinner rings mean colder years.
How does glacier retreat show climate change?
Many glaciers are shrinking due to rising temperatures.
Why are sea levels rising?
ice is melting, and warm water expands (thermal expansion).
Name three natural causes of climate change.
Orbital changes
volcanic activity
solar output.
Ocean Currents
How do humans contribute to climate change?
Burning fossil fuels
deforestation
farming (methane from cows).
Industry
Transport
Name three effects of climate change.
Extreme weather
rising sea levels
and loss of habitats.
How does climate change affect food and water supply?
Droughts and floods make farming harder, leading to shortages.
What is mitigation?
Reducing causes of climate change (e.g., using renewable energy).
What is adaptation?
Adjusting to climate change (e.g., building flood defences).
How can trees help reduce climate change?
Trees absorb CO₂, reducing greenhouse gases
Name an international agreement to tackle climate change.
The Paris Agreement.
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How do ocean sediments show past climates?
layers of sediment contain tiny fossils that reveal past temperatures.
How do extreme weather events provide evidence for climate change?
Rising Sea Levels and Coastal Flooding
More Frequent Droughts and Wildfires
Stronger Storms and Hurricanes
Increased Heatwaves
What are Milankovitch Cycles?
A: Cphanges in Earth’s orbit that affect climate over thousands of years.
How do volcanic eruptions affect climate?
They release gases and ash that can cool or warm the Earth.
What’s orbital changes
Orbital changes is when earths position around the sun changes over time
What happens in volcanic activity?
Eruptions release gases that can warm or cool the earth
What’s meant by solar output ?
Solar output means that the sun’s energy varies over time
How is burning fossil fuels a human cause?
cars, factories and power stations release CO2
How is deforestation a human cause?
Fewer trees mean more CO2
How is farming a human cause?
Cows produce methane, fertilizers release greenhouse gases
How to manage climate change?
Use renewable energy (solar, wind, hydro)
Plant more trees (afforestation)
international agreements.
Build flood defences.
Grow draught- resistant crops
Relocate people from high risk area.
what’s meant by climate change?