Global Wrming

Question 1

What is long term climate change?

Answer 1

Change over tens and hundreds of thousands of years. It includes ice ges and interglacial periods.

Question 2

When did the last ice age end?

Answer 2

11,500 years ago

Question 3

What causes long term climate change?

Answer 3

Changes in the sun’s orbit
Volcanic activity
Sun spots
Movement of tech tonic plates.

Question 4

How do we know about long term climate change?

Answer 4

Ice cores: layering effect. Bubbles of air and co2 are trapped
More co2=warm periods
Less co2=cold periods

Ocean sediments: collected and analysed to see what temperatures were like in the past.

Pollen analysis: show how vegetation was like before and which plants grew more depending on the weather conditions.

Question 5

How do we know about medium term climate change?

Answer 5

Historial records: shows temperature

Written accounts and paintings: we can see how weather was described. In Paintings we mostly focus on if it was rainy, sunny, cloudy because we cannot see how warm or cold it was.

Tree rings:
thicker= warm period
less thick= cold period

Question 6

What is medium term climate change?

Answer 6

Change over the last couple of thousand of years

Question 7

What causes medium term climate change?

Answer 7

Variations in solar output

Volcanic activity

Question 8

What is short term climate change?

Answer 8

Changes or hundred years/ few decades. In this period the changes have been happening much more quickly and results have been dramatic.
It has risen 0.85 degrees Celsius in the past 100 years.

Question 9

How do we know about short term climate change?

Answer 9

Weather stations: record + tell us wether over the world

Sea level rise: shows temperature. EVIDENCE

Photographs: show how things change due to climate change.

Question 10

What causes short term climate change?

Answer 10

Human activity

Burning fossil fuels 
Deforestation 
Agriculture
Waste disposal 
Unsustainable lifestyle