Evidence For Climate Change

Question 1

What is the last 2.6 million years called?

Answer 1

Quaternary period

Question 2

Today’s temperature is higher than the last……?

Answer 2

400,000 years

Question 3

Since 1880, how much has the global temperature increased by?

Answer 3

0.58 degrees Celsius

Question 4

How do we know the temperature from the distant past?

Answer 4

We can study oxygen trapped in ocean sediments or water molecules from ice cores and calculate the temperature.

Question 5

What are some recent evidence of a warming world?(3)

Answer 5

Shrinking glaciers
Rising sea levels
Seasonal changes

Question 6

How much percent has the arctic sea ice thinned?

Answer 6

65% since 1975

Question 7

How much has the sea risen in the last 100 years?

Answer 7

10-20cm

Question 8

Why have the sea levels risen?

Answer 8

-Glaciers melting release more freshwater into the sea.
-Thermal expansion - the sea expands in volume as it warms

Question 9

What are seasonal changes?

Answer 9

The changing of the timing of natural seasonal events such as tree flowering and bird migration.

In the 1990s, 65 species nested 9 days earlier than in the 1970s