Hazardous Earth - Climate - Evidence for natural climate change

Question 1

What are ice cores?

Answer 1

Ice cores are the buildup of ice over 800,000 years. C02 is trapped in the ice and scientists measure this to find the temprature of 100s and 1000s of years ago. They drill down into sheets and collect long, thin cylinder of ice

Question 2

What are tree rings?

Answer 2

growph rings in the cross section of a tree that can tell us what the climate was like 100s and 1000s of years ago

Question 3

How can historical sources provide evidence for natural climate change?

Answer 3

these documents include descriptions on what the climate was like during the past.

Question 4

When are tree growth rings wider?

Answer 4

In warmer. wetter climates

Question 5

When are tree growth rings narrower?

Answer 5

In colder, drier climates

Question 6

What are the three types of orital change?

Answer 6

1. Eccentricity
2. Axial Tilt
   3 Precession