Question

6. In (physical/chemical) weathering, the chemical nature of the rock is not altered ​

Answer 1

Answer:

Physical weathering;

Physical weathering, also called mechanical weathering or disaggregation, is the class of processes that causes the disintegration of rocks without chemical change. It is usually much less important than chemical weathering, but can be significant in subarctic or alpine environments.

Chemical Weathering;

Chemical weathering involves the interaction of rock with mineral solutions (chemicals) to change the composition of rocks. In this process, water interacts with minerals to create various chemical reactions and transform the rocks. Chemical weathering is a gradual and ongoing process as the mineralogy of the rock adjusts to the near-surface environment. Secondary minerals develop from the original primary minerals of the rock. In this the processes oxidation and hydrolysis are the most frequent chemical processes that take place. Chemical weathering is enhanced by such geological agents as the presence of water and oxygen, as well as biological agents as the acids produced by microbial and plant root metabolism.