Chapter 6 Weathering

Question 0

What is denudation

Answer 0

Wearing down of the surface of the earth

Question 1

Two types of weathering

Answer 1

Mechanical

Chemical

Question 2

Erosion

Answer 2

Wearing away of rock,the transportation of the Rock and its deposition.
Carried out by rivers, the sea glaciers and wind

Question 3

Weathering

Answer 3

The breakdown of rock. Usually by the forces of weather. The broken rock lies where it has been broken.

Question 4

Two types of mechanical weathering

Answer 4

Freeze thaw action

Exfoliation

Question 5

Carbonation

Answer 5

Rain falls and takes in carbon dioxide from the air.
Carbon dioxide worked like a week acid.
Opens cracks and joints in limestone.
Called carbonation

Question 6

Stalagmite

Stalactite

Answer 6

Stalagmite from ground

Stalactite from ceiling

Question 7

Karst landscape

Answer 7

In the ice age glaciers cleared away the earths covering. Eg the burren.

Question 8

Features of a karst landscape

Answer 8

Swallow holes
Underground rivers+caves
Limestone pavements

Question 9

Clints

Answer 9

Blocks of limestone form pavement

Question 10

Grikes

Answer 10

Gaps between the blocks. Joints in the rocks were opened wider during process of carbonation.

Question 11

Swallow holes

Answer 11

Openings in the surface through which the rivers disappear underground.

Question 12

Open cast mining

Answer 12

Is used when rocks and minerals are close to the surface. Quarrying

Question 13

Shaft mining

Answer 13

Used to extract rocks and minerals deeper I the ground

Question 14

Igneous rock

Answer 14

Formed when magma or lava cooled beneath and above the surface
Eg granite, basalt

Question 15

Sedimentary rock

Answer 15

Formed when existing rocks, animal and plant life were worn down and compressed to form new rocks
Eg limestone, sandstone

Question 16

Metamorphic rock

Answer 16

When existing rocks are changed by great heat and/or pressure
Eg marble, quartzite, slate

Question 17

Marble

Answer 17

Limestone changed by great heat and pressure
Different colours black from coal Kilkenny Red from sandstone cork Uses.
Kitchen work tops,sculptures, Eg
headstones Connemara marble Co.Galway

Question 18

Limestone

Answer 18

Formed from shells and bones of fish at the bottom of the sea. Pressure from these layers formed it. Most common rock in Ireland. 40% is it.
Uses. Eg
Building road surfaces ,buildings The burren Co.Clare
Cement.