Glacation

Question 1

Name 3 causes of ice ages

Answer 1

Earths orbit and axis
Earths atmosphere
Ocean currents

Question 2

What is plucking

Answer 2

As a glacier moves, there’s friction between the glacier and the ground beneath it. This friction causes the bottom of the glacier to melt. The melt water makes its way into cracks in the rocks underneath glacier. The meltwater then refreezes around the rocks. When the glacier moves it plucks the frozen melt water on the rocks from the ground. The rocks are then carried away with the glacier

Question 3

What are striatons

Answer 3

These are scratch marks left behind on the rocks and tell us which direction the glacier moved

Question 4

Give me a description of a cirque

Answer 4

A cirque is a base shaped hollow in a mountain. It looks like an armchair it has three steep sides and often contains a lake. A cirque was the birth of a glacier.

Question 5

Give me an example of a cirque

Answer 5

Coumshinguan in Co waterford

Question 6

What are the processes involved in cirque’s

Answer 6

Abrasion and plucking

Question 7

Give me an explanation on how a cirque is formed

Answer 7

When snow accumulates in a hollow hole high up in the mountain, the snow is compressed to form ice. The ice plucks rocks from the side of the mountain as it begins to move. These rocks make the hollow deeper through the process of abrasion. The ice eventually overflows from the hollow and gravity causes the ice to move downhill. The ice that is left behind melts and forms a lake in the hollow. This lake is called a Tarn.

Question 8

Give me two benefits of glaciation

Answer 8

tourism :it produces beautiful landscapes, e.g. gap of Dunlow in county Kerry
Industry : sand and gravel are used for buildings

Question 9

Give me two negatives of glaciation

Answer 9

Poor drainage: drumlins can lead to poor drainage causing bogs
Flooding: ice melts and floods downhill ruining land

Question 10

What is a ribbon lake?

Answer 10

A ribbon Lake and a long no lake on the floor of the U-shaped valley

Question 11

What is a U shaped value?

Answer 11

u shaped Valley has a wide flat floor and steep sides

Question 12

What are Boulder clay Plains?

Answer 12

A boulder clay plane is a lowland area that is covered in layer of boulders clay sand stones called Boulder Clay

Question 13

What are drumlins?

Answer 13

Germans are oval shaped pills made of boulder clay

Question 14

What are erratics?

Answer 14

This is when there are boulders of different rock in an area where is mostly called the own rock e.g. might find a rock of granite with local type of rock is limestone