GENERAL GEOLOGY

Detailed explanation-1: -Water, ice, acids, salts, plants, animals, and changes in temperature are all agents of weathering. Once a rock has been broken down, a process called erosion transports the bits of rock and mineral away.

Detailed explanation-2: -Rocks break down into smaller pieces through weathering. Rocks and sediment grinding against each other wear away surfaces. This type of weathering is called abrasion, and it happens as wind and water rush over rocks. The rocks become smoother as rough and jagged edges break off.

Detailed explanation-3: -Physical weathering, sometimes called mechanical weathering, includes all the processes which break rocks apart without changing their chemical composition. Following are examples of physical weathering processes. Rock abrasion occurs when rocks collide with one another or rub against one another.

Detailed explanation-4: -If you have ever collected beach glass or pebbles from a stream, you have witnessed the work of abrasion. Water flowing through river or beach cobbles causes them to hit each other. This contact causes abrasion, which makes the rocks round.