Question

Which of the following statements is true?

A.The lower the number of living organisms in an area, the higher the rate of weathering will be.
B.Raindrops and snowflakes are too light to cause erosion.
C.Rocks rich in calcium, potassium, and sodium, weather into fertile soil.
D.Wind erosion removes the least fertile part of soil.

Answer 1

C. Rocks rich in calcium, potassium, and sodium, weather into fertile soil.

Step-by-step explanation:

Weathering can be defined as the physical and chemical breakdown of rock into smaller pieces called sediment. Weathering can be classified into two categories namely;

I. Physical weathering : it is the process of breaking rocks into pieces without affecting its chemical composition e.g temperature, abrasion and frost action.

II. Chemical weathering : it is the process of breaking rocks into pieces by chemical action which leads to changes in its chemical composition e.g carbonation, hydration, plant acid and oxidation.

Hence, the statement which is true is that, rocks rich in calcium, potassium, and sodium, weather into fertile soil because these nutrients (chemical elements) are responsible for determining the level of fertility of a soil.