1.5 - NZ Isostasy

Question 1

Describe isostasy

Answer 1

An increase or decrease in the height of the land, affecting the sea level

Question 2

Beaches on emergent coastlines are called

Answer 2

Raised beaches

Question 3

Why can the land sink

Answer 3

The mantle is malleable so can change shape

Question 4

Isostasy does what to sea level

Answer 4

Around sinking land it causes local sea level rise

Compression

Question 5

What happens to sea level on opposite pole

Answer 5

Appears to fall but it’s just the land rising

Question 6

Details about NZ

Answer 6

In Kaikoura, mainly rose by 1.5m, 6m in some areas

South rose up

Question 7

Glaciers formed where in NZ

Answer 7

At the north of it

Question 8

What happens when glaciers form

Answer 8

Land they form on sinks due to the glaciers’ weight - decrease height
Opposite pole rises up forming an emergent coastline - increase height

Question 9

What happens when glaciers melt

Answer 9

Isostatic rebound

Question 10

Describe isostatic rebound

Answer 10

Land where glaciers were rises up and sea level falls