Eustatic And Isostatic Changes

Question 1

Eustatic change

Answer 1

Global change in sea levels as a result of a fall or rise in the sea level itself

Question 2

Isostatic change

Answer 2

Local changes in the sea level as a result of the land itself rising and falling in relative to the sea (REBOUND)

Question 3

Causes of sea level rise

Answer 3

Water volume
-climate change
-thermal expansion (volume of water increases as it gets warmer)
-land ice melting (melting of glaciers and ice sheets)
Subsistence (coastal areas sinking-often due to groundwater extraction. Effectively make sea level higher).

Question 4

Major changes in sea level in the last 10,000 years

Answer 4

Weight of ice sheets on north of England forced land down. Rebound occurs causing southern England to submerge.
ISOSTATIC CHANGE

Question 5

Tectonics

Answer 5

Larger oceans=lower sea levels
Smaller oceans=higher sea levels
THE DEPTH OF THE SET ANOUNT OF WATER ON THE EARTH CAN ALTER DEPENDING ON THE VOLUME OF AREA IT HAS TO FILL