Weathering and erosion of rocks

Question 1

Weathering

Answer 1

Base of soil formation. Rocks on earth surface break down: physical processes & chemicals interactions
Rock desintegration: easier transport

Question 2

Physical weathering

Answer 2

Mechanical process. Disintegration/dislocation of rock into smaller fragments.
Rocks falling down a mountain, root growth in cracks…
Most active in cold zones

Question 3

Chemical weathering

Answer 3

Elements react with each other influenced by temperature, atmosphere, water, acids.
Formation of rust by oxidation
Most effective in worm tempered tropical areas
May release calcium compunds into soil

Question 4

Disintegration of massive rock

Answer 4

Increase in the specific surface exposed to weathering.

+ surface area + chemical weathering

Question 5

Weathering products transport

Answer 5

By water wind ice or gravity: Erosion
Resulting degraded products: sediments
Transported and deposited in lower levels in landscapes: formation of sedimentary rocks