Question

Which one of the following is an example of physical weathering?
A. Frost Action
B. Weathering due to the reaction between rock and water
C. Tree roots fracturing the rock
D. None of the above

Answer 1

Hint: In order to answer this problem we should first understand weathering. The breaking down or dissolving of rocks and minerals on the Earth’s surface is known as weathering. Physical weathering and chemical weathering are the two types of weathering processes.

Complete answer:
Let us now understand about physical weathering. The geological process of rocks breaking apart without altering their chemical composition is referred to as physical weathering in science. Physical weathering is caused by the Earth’s and environment’s motions breaking apart rock formations over time. Physical weathering may also lead to the breakdown of other elements in the climate, such as soil and minerals.

Frost action refers to the weathering processes that occur as a result of repeated freezing and thawing periods. As a result, frosted activity is distinct from glacial action, which involves processes involving moving ice. Repeated cycles of freezing and thawing of water in pores, holes, and other openings, typically at the surface, cause mechanical weathering.

In weathering due to the reaction between rock and water, the water reacts with mineral grains in rocks to form new minerals (clays) and soluble salts, causing chemical weathering. When the water is slightly acidic, these reactions are more common.Plants break up rocks with their rising roots, or plant acids help dissolve rock, resulting in organic weathering.

Hence, the correct answer is option A.

Note: The chemical reaction of water, carbon dioxide, and naturally derived chemicals with rocks and soils is known as chemical weathering. Water is the primary cause of both physical and chemical weathering, while atmospheric oxygen and carbon dioxide, as well as biological organisms activities, play a role.