Which component is not formed by the weathering of rocks?
A. pebbles
B. rocks
C. clay
D. humus
humus i think k.g.
The component that is not formed by the weathering of rocks is humus. Humus is a type of organic material that forms from the decomposition of plants and animals. It is found in soil and is rich in nutrients.
To understand this concept, it helps to have a basic understanding of the rock cycle and the process of weathering. The rock cycle is a continuous process in which rocks are formed, broken down, and transformed into different types of rocks. Weathering is one of the processes that contribute to the breakdown of rocks.
Weathering can occur through physical or chemical processes. Physical weathering involves the physical breakdown of rocks into smaller pieces, such as pebbles. Chemical weathering, on the other hand, involves the chemical alteration of rocks and minerals.
Pebbles, rocks, and clay are all formed through the weathering of rocks. Pebbles and rocks are the products of physical weathering, as larger rocks are broken down into smaller pieces. Clay, on the other hand, is formed through chemical weathering, where certain minerals in rocks undergo chemical reactions and transform into clay minerals.
However, humus is not formed through the weathering of rocks. Instead, it is formed through the decomposition of plants and animals, such as fallen leaves or dead organisms. As these organic materials break down, they release nutrients and form a dark and crumbly substance known as humus. Humus is an essential component of soil, providing nutrients for plant growth.
In summary, while pebbles, rocks, and clay are all components formed by the weathering of rocks, humus is not. Humus is formed through the decomposition of organic materials.