Weathering and soil Flashcards
1
Q
What is physical weathering?
A
when rock sizes are reduced, intact rocks break into smaller pieces or debris
2
Q
what is chemical weathering?
A
when chemical reactions alter or destroy minerals when rock comes in contact with water solutions or air.
3
Q
What is frost wedging?
A
This occurs when trapped water in joints freeze and it expands which causes the joint to grow.
4
Q
How to trees induce weathering?
A
This occurs with root wedging, when tree roots grow they apply pressure to their surroundings and can push joints open.
5
Q
What are the five types of physical weathering?
A
- jointing
- frost wedging
- salt wedging
- root wedging
- Thermal expansion
