How does chemical weathering change the composition of rocks?

It is sometimes also called mechanical weathering since it only causes mechanical changes to the rock's structure. Forces that shatter rocks, rub away rock surfaces, or form cracks within the rock are examples of physical weathering. Physical weathering does not change the chemical composition of rocks. read more

Chemical weathering. Chemical weathering occurs when there are changes in the chemical compositions of the rock or minerals from exposure to the environment. Chemical weathering includes chemical changes that may decompose, dissolve or break down various parts of the rock or other landform. read more

a type of weathering where rock is physically broken down into smaller pieces. does not change the rock's chemical composition. read more

While physical weathering breaks down a rock's physical structure, chemical weathering alters a rock's chemical composition. Physical weathering works with mechanical forces, such as friction and impact, while chemical weathering takes place at the molecular level with the exchange of ions and cations. read more

This type of weathering occurs when rocks and other landforms are broken down by physical factors in the environment. These physical factors include wind, water, sun, ice and temperature changes. This type of weathering does not change the chemical composition of the rock or minerals. read more

the chemical or physical process that break down rocks into smaller and smaller pieces. mechanical weathering. a type of weathering where rock is physically broken down into smaller pieces. does not change the rock's chemical composition. read more

chemical weathering can change a rock by the water freezing inside the roclk and the crease of the rock breaking by the frozen water inside of it. read more