Weathering

Question 1

What are the types of weathering

Answer 1

Biological weathering caused by the action of plants or animals.
Chemical weathering caused by water as a weak acid.
Physical weathering caused by changes in temperature.

Question 2

The types of limestone

Answer 2

Chalk, Jurassic limestone and Carboniferous limestone

Question 3

Mechanical weathering

Answer 3

Freeze-thaw and onion-skin

Question 4

Types of rock

Answer 4

Igneous rocks, sedimentary rocks and metamorphic rocks

Question 5

What is the statement for biological weathering

Answer 5

Plants can grow in cracks in rocks. As their roots develop they can force the cracks to widen and the rock to break apart. Lichens and mosses can also grow on rocks. They release an acid which can cause the rock surface to crumble

Question 6

Chemical weathering statement

Answer 6

As rainwater falls through the air it becomes a very weak type of acid. When this acidic water comes into contact with rock it starts to dissolve it. The rate at which it dissolves depends on the type of rock. Limestone, for example, dissolves very quickly. Many buildings are built of limestone and the result of chemical weathering can clearly be seen.