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 rock d. because the temperature changes in the mountains allow for the repeated freezing and thawing of water caught in cracks 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 entering rock cracks, freezing and expanding, which is a form of mechanical weathering. Mechanical weathering breaks rocks physically. Erosion involves the movement of rock - particles, oxidation is a chemical reaction with oxygen, and chemical weathering changes rock chemically.
2. In mountains, temperature changes are significant. Water in rock cracks freezes and thaws repeatedly due to these temperature changes, making ice - wedging more obvious. Altitude affects temperature which in turn affects freezing and thawing, not directly the freezing process itself. Gravity and pressure are not the main factors for ice - wedging in mountains.
3. Soil is a mixture of weathered rock, organic matter, air, and water. Erosion is a process of transporting soil and rock particles, 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 rock
3. A. erosion