Question

1. what type of weathering is shown in the figure? a. mechanical weathering b. erosion c. oxidation d. chemical weathering 12. why is ice wedging most obvious in the mountains? a. because the altitude directly contributes to how the water freezes in the cracks of rocks b. because gravity pulls on the water in the cracks more if its found higher in the mountains c. because the pressure in the mountains allows for the repeated freezing and thawing of water caught in cracks of rocks d. because the temperature changes in the mountains allow for the repeated freezing and thawing of water caught in cracks of rocks 13. soil is a mixture of all of the following except ________. a. erosion b. weathered rock c. organic matter d. air

Explanation:

1. The figure shows water seeping into rock cracks, freezing and expanding, which is a form of mechanical weathering. Mechanical weathering breaks rocks physically without changing their chemical composition.
2. In mountains, temperature changes are significant. Water in rock - cracks freezes when it's cold and thaws when it's warm. This repeated process of freezing and thawing is called ice - wedging.
3. Soil is a mixture of weathered rock, organic matter, air, and water. Erosion is a process of wearing away soil and rock, not a component of soil.

Answer:

1. A. mechanical weathering
2. D. because the temperature changes in the mountains allow for the repeated freezing and thawing of water caught in cracks of rocks
3. A. erosion