Chapter 4

Question 1

Isostacy

Answer 1

This is the Earth’s crust response to the addition or removal of mass from the surface of the Earth. When mass is added, the crust is pushed down. When mass is removed, the crust rebounds.

Question 2

Isostatic adjustment (see photo)

Answer 2

The way the Earth’s crust responds to the weight of a glacier. At A, the crust is pushed down. At B, next to the glacier, the crust is pushed up, forming a peripheral bulge.

Question 3

What is the link between ice ages, the weight of ice and liquid water and earthquakes? Give an example.