Question

Which of the following is an example of chemical weathering?

O A. Water freezes in cracks in a rock, breaking the rock apart.
O B. Weak acid breaks down minerals by reacting with them.
O C. Plant roots grow and split rock into pieces.
O D. An animal kicks a rock down a hill where it hits another rock and shatters.

Answer 1

Answer:O B. Weak acid breaks down minerals by reacting with them.

Step-by-step explanation:

Chemical weathering is the process whereby rain water which sometimes can be acidic ( As rain falls down it reacts with CO2 in the atmosphere and form acid rain), This reacts with the minerals contained in rocks, dissolves and degrades them further to form entire new minerals.

An example of a rock that is greatly affected by overexposure of acid rain is limestone containing calcite which easily degrades by acid rain.

Other processes whereby Chemical weathering can occur are through reaction with water and oxygen.