L2 - Dartmoor Tor Formation Flashcards Preview

1GB2 Topic 4a UK Changing Physical Landscape. GCSE Geography. > L2 - Dartmoor Tor Formation > Flashcards

Flashcards in L2 - Dartmoor Tor Formation Deck (11)
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1

Define the term 'weathering'?

Break down of rock 'in situ' (where it stands)

2

Name the 3 main types of weathering...

Mechanical, Chemical and Biological

3

Explain how climate can influence the types of weathering present a landscape

Large variations in temperature into the cold can lead to freeze-thaw weathering. Warmer and wetter climates lend themselves to chemical and biological weathering

4

Describe the 4 processes of river erosion..

Hydraulic action - pressure created as air and water squeezed into rock cracks
Attrition - rocks collide making smaller ones
Abrasion - surface friction smooths rock
Corrosion - chemical reaction between water and rock

5

Describe the 4 processes of river sediment transport..

Traction - large stones roll along bed - requires energy
Saltation - bouncing along river bed
Suspension - small rocks are suspended and carried in water column
Solution - rock minerals dissolve into water

6

Explain the role of slope processes in the formation of distinctive upland environments?

Solifluction - active layer of permafrost is saturated and moves boulders down slope under gravity to create clitter slopes.

7

Explain the role of post-glacial river processes in the formation of an upland landscape?

Erosional processes (4 types) break down larger sediment into smaller pieces to be carried away by transport processes (4 types).

8

Explain the role of tectonics in making Dartmoor Distinctive.

Tectonic activity millions of years ago created large intrusive igneous batholith (now eroded into Tors)

9

Which weathering processes have played a part in the formation of Dartmoor?

Hydrolysis (chemical weathering when UK was nearer the Equator) and Freeze-Thaw (now UK is in colder climate)

10

Can you name a specific type of mechanical weathering?

Freeze-Thaw

11

Can you name a specific type of chemical weathering?

Hydrolysis