Geography Chapter 15

Rock structure
It's properties and appereance
1 of 24
Rock resistance
strength of the rock
2 of 24
rock that consists of tiny pores through which water can pass through
3 of 24
on a warm day when water enters the cracks of a rock and freezes on a colder day causing an increased pressure exertion on the rock. When temperatures rises, the ice melts and pressure is released this widens the cracks of the rock and causes pieces
4 of 24
happens in warm climates when rocks is repeatedly heated and cooled. This creates an onion effect where the surface layers peel off.
5 of 24
Limestone solution/Carbonation
caused by carbonic acid in natural rainwater, reacts chemically with limestone rocks, the limestone slowly dissolves and it is removed in solution by running water.
6 of 24
Soil creep
slowest of downhill movements, occurring on very gentle and well-vegetated slopes
7 of 24
rapid movements most likely to occur on steep slopes without warning
8 of 24
noticeable movement of material
9 of 24
A long, more or less continuous cliff or relatively steep slope facing in one direction.
10 of 24
Soil profile
Top layer of the soil
11 of 24
Soil horizons
the different layers of the soil A, B and C horizons
12 of 24
Parent rock
underlying rock weathered to give a layer of loose, broken material
13 of 24
process of land degradation where land turns into a desert from severe drought
14 of 24
Formation, characteristics, examples, uses of igneous rocks
Formation: from volcanic activity, consist of christals, eg. granite and basalt
15 of 24
Formation, characteristics, examples, uses of Sedimentary rocks
eg. limestone, sandstone, coal consist of small particles that have been eroded
16 of 24
Formation, characteristics, examples, uses of Metaphoric rocks
marble altered by extremes of pressure or heat eg. limestone changed into
17 of 24
Causes and effects of mass movement
soil creep, mudlows
18 of 24
Advantages and problems of mining and quarrying in areas like National Parks
Advantages: provides jobs, improved local roads for extra traffic, can create local processing industries. Problems: loss of wildlife, air pollution, noise, loss of farmland
19 of 24
Causes and effects or desertification
unreliable rainfall, fragile environment, overgrazing, farming on average land, destruction of plants
20 of 24
How are soils formed?
The parent rock get repositioned by water, wind, ice or volcanic activity, addition of water,gases, living organisms and decayed organic matter causes the formation of soil
21 of 24
Chemical weathering
decomposition of rocks caused by a chemical change change within the rock eg. limestone solution
22 of 24
Physical weathering
breaking down of rocks, soils and minerals as well as artificial materials in contact with the Earths atmosphere and waters. eg. freeze-thaw or frost shattering
23 of 24
Biological weathering
Activity of living organisms. eg. growth of roots
24 of 24

Other cards in this set

Card 2


Rock resistance


strength of the rock

Card 3




Preview of the front of card 3

Card 4




Preview of the front of card 4

Card 5




Preview of the front of card 5
View more cards


No comments have yet been made

Similar Geography resources:

See all Geography resources »