Causes Of Eustatic Change

Question 1

What are the causes (3)

Answer 1

Thermal expansion
Chnages in ice sheet extent
Tectonic activity

Question 2

What thermal expansion of water (2)

Answer 2

When water heated = expands
Larger volume = takes up more space

Question 3

Changes in ice sheet extent what (2+)

Answer 3

Ice forms on land during a glacial period + removes water from other stores = sea levels fall
When ice on land melts = less water locked up in ice on the land = sea levels rise

Question 4

Tectonic activity what (3)

Answer 4

New land formed under oceans = mid ocean ridges
Takes up space on ocean basins which could have been occupied by water
Water is displaced and sea levels rise