Rocks

Rocks

3 types of rock
1. Igneous
2. Sedimentary
3. Metamorphic
Igneous
Sedimentary
Metamorphic
Igneous
1. Granite
  1. Used for sculptures and buildings
  2. Formed from extreme head
Sedimentary
1. Limestone
  1. Limestone is used as a building material
  2. Often formed from shells
Metamorphic
1. Marble
  1. Used for work tops and statues
  2. Formed when limestone is exposed to high temperatures and pressures
Weathering
1. Freeze thaw
  1. Water - eg from rainfall or melting snow and ice - becomes trapped in a crack or joint in the rock. If the air temperature drops below freezing, the water will freeze and expand by 9-10 per cent putting pressure on the rock. The ice will melt when the temperature rises above freezing. If this process happens repeatedly, the rock will weaken and eventually shatter into angular fragments. The fragments may then be deposited as scree at the foot of a slope.
2. Biological weathering
  1. Animals and plants can wear away rocks. . For example, burrowing animals such as rabbits can burrow into a crack in a rock, making it bigger and splitting the rock

Resource summary

	Created by HarveyHancock99 over 9 years ago