Question

a. what is the difference between mechanical weathering and chemical weathering? b. what are three types of eroding action by water? c. what factors contribute to soil fertility?

Explanation:

a. Mechanical weathering breaks rocks physically (e.g., by temperature changes), while chemical weathering changes rock's chemical composition (e.g., through oxidation).
b. Three types of water - erosion are splash erosion (rain - drop impact), sheet erosion (thin layer removal), and gully erosion (deep channels formation).
c. Factors contributing to soil fertility include organic matter content, soil pH, availability of nutrients (N, P, K etc.), soil structure, and presence of beneficial microorganisms.

Answer:

a. Mechanical weathering is physical break - up, chemical weathering is chemical change.
b. Splash erosion, sheet erosion, gully erosion.
c. Organic matter, soil pH, nutrient availability, soil structure, beneficial microorganisms.