SSC MTS EXAM

Detailed explanation-1: -External forces, such as weathering and erosion, also alter landscapes and in some instances create the soil that is needed for plant life. Weathering refers to physical and chemical processes that change the characteristics of rock on or near the earth’s surface.

Detailed explanation-2: -Examples of external forces include dead loads, such as the weight of the structure itself and the non-structural materials it supports, and live loads, which include moving loads, such as occupants, goods, and furniture, as well as wind loads, seismic loads, and impact loads, among others.

Detailed explanation-3: -External processes include (1) weathering-the disintegration and decomposition of rock at or near the surface, (2) mass wasting-the transfer of rock material downslope under the influence of gravity, and (3) erosion-the incorporation and transportation of material by a mobile agent, usually water, wind, or ice.