There are different types of chemical weathering processes, such as solution, hydration, hydrolysis, carbonation, oxidation, reduction, and chelation. Some of these reactions occur more easily when the water is slightly acidic.

Chemical weathering does not cause physical damage to rock but rather is a reaction between the chemical composition of the rock and outside chemicals. Chemical weathering can make a rock more vulnerable to physical weathering forces. Rust is weaker than iron and makes the rock more likely to degrade.

Chemical weathering occurs when water dissolves minerals in a rock, producing new compounds. Hydrolysis occurs, for example, when water comes in contact with granite. Feldspar crystals inside the granite react chemically, forming clay minerals. The clay weakens the rock, making it more likely to break.

The causes of chemical weathering are chemical reactions such as oxidation, carbonation, hydrolysis and acid-base reactions.

Liquid water is the major agent of erosion on Earth. Rain, rivers, floods, lakes, and the ocean carry away bits of soil and sand and slowly wash away the sediment. Rainfall produces four types of soil erosion: splash erosion, sheet erosion, rill erosion, and gully erosion.

Physical Weathering in Nature. When water in a river or stream moves quickly, it can lift up rocks from the bottom of that body of water. As ice forms in the cracks of a street, the water expands and pushes against the surrounding rock, making the cracks wider, eventually breaking apart the rock.

The three main forces that cause erosion are water, wind, and ice. Water is the main cause of erosion on Earth.

Water Erosion

Agents responsible for weathering include ice, salts, water, wind and plants and animals. Road salt and acids represent a form of chemical weathering, as these substances contribute to the wearing away of rocks and minerals as well.

Three agents of physical weathering that can cause abrasion are moving water, wind and gravity. Also Rocks suspended in the ice of a glacier can cause abrasion of other rock on earths surface.

Soil is the material which is formed as the result of wethering hence it is not the agent of wethering and this is the right answer.

The salt prevents the water from freezing. Alternatively, the cracks of the rock/asphalt/cement could be filled. Wind barriers are also used to minimize weathering. Sealants are used on surfaces, such as stains on decks, to prevent the decomposition of such materials.

Wind, Water, Gravity There are three agents of physical weathering that can cause abrasion: moving water. wind. gravity.

Gravity can cause erosion and deposition. Gravity makes water and ice move. It also causes rock, soil, snow, or other material to move downhill in a process called mass movement. Particles in a steep sand pile move downhill.