Question

How is mechanical weathering caused by ice wedging similar to mechanical weathering caused by plants roots ?

Answer 1

Mechanical weathering by ice wedging and plant roots involves physical forces that cause rocks to break apart. Both processes contribute to the formation of soil, which is essential for plant life and ecosystem development. Soil characteristics are influenced by the types and rates of weathering that occur.

Step-by-step explanation:

Mechanical Weathering by Ice Wedging and Plant Roots

Mechanical weathering occurs when rocks are broken down physically without any change in their chemical composition. Two common types of mechanical weathering are ice wedging and the growth of plant roots. Ice wedging happens when water seeps into cracks in rocks, freezes, and expands. Since ice occupies more volume than liquid water, it exerts pressure on the rock, causing it to break apart over time. This is similar to the process of mechanical weathering caused by plant roots, where roots grow into the cracks in rocks. As the roots expand in size, they exert a force that can split the rock apart. Both processes involve a physical force that expands and applies pressure within rock cracks, leading to the breaking and disintegration of the rock.

In ecosystems, the breaking down of rocks contributes to the formation of soil. Soil creep, where freezing and thawing soil expands outwards and subsides, can form terraces on slopes. Ferns play a dual role by breaking down rocks and stabilizing soil, and pioneer species like lichens initiate soil formation by breaking down rock surfaces. Understanding these processes is key to knowing why certain rocks are more prone to weathering and how soil characteristics are shaped by the weathering process.

Answer 2

Answer;

Plants often send their roots into existing cracks in rocks and expand them and break them.

Explanation;

• Weathering is the process by which natural forces break down
• rocks. Mechanical weathering takes place as a result of physical forces which break down rocks.
• Ice wedging is a type of mechanical weathering that occurs when water freezes, in the cracks and pores and expands. The force of its expansion is strong enough to split the rocks apart.
• Mechanical weathering caused by plant roots when Trees, bushes, and other plants may take root in cracks in rocks, and as the roots of these plants grow, they wedge open the crack and split rocks apart.