Weathering Types

Question 1

What is freeze thaw and what type of weathering

Answer 1

Mechanical weathering
Water enters cracks.
Temperature drops and ice is formed, expanding the crack.

Question 2

Biological weathering example

Answer 2

Plant roots can get into small cracks in the rock.
As the roots grow, the cracks become larger.
This causes small pieces of rock to break away.

Question 3

Chemical weathering -what is acid rain

Answer 3

Rainwater and seawater can be a weak acid. If a coastline is made up of rocks such as limestone or chalk, over time they can become dissolved by the acid in the water.