OBJECTIVE FORESTRY

Detailed explanation-1: -Mechanical weathering: is the physical breakdown of rocks into smaller pieces and fragments. It does not alter the chemical composition of the original rock. What are the causes of Mechanical Weathering? Mechanical weathering is common is Deserts and Tundra climates.

Detailed explanation-2: -Mechanical weathering physically breaks bedrock into smaller pieces. The usual agents of mechanical weathering are pressure, temperature, freezing/thawing cycle of water, plant or animal activity, and salt evaporation.

Detailed explanation-3: -The rocky subsoil underlies the topsoil and contains less organic material. Residual soil and transported soil. When soil is developed from the weathering of the underlying bedrock it is called residual soil. Transported soil is deposited by agents such as ice and water and is not derived from the underlying bedrock.

Detailed explanation-4: -Weathering is the breaking down or dissolving of rocks and minerals on Earths surface. Once a rock has been broken down, a process called erosion transports the bits of rock and minerals away. Water, acids, salt, plants, animals, and changes in temperature are all agents of weathering and erosion.

Detailed explanation-5: -Chemical weathering occurs when water gets inside of a rock and reacts with some of the mineral components of the rock, chemically changing them and weakening the rock’s structure. This causes the rock as a whole to break down, and over time chemical weathering can break a rock into small enough pieces to become soil.