Question

1. what is the most important type of physical weathering in high mountain areas?

a. abrasion by wind
b. oxidation and rusting
c. frost wedging
d. dissolving into solution

1. over time a rock breaks up into smaller pieces without any change in its composition. this is an example of

a. chemical weathering
b. elemental weathering
c. density change
d. physical weathering

Explanation:

For question 6:

High mountain areas have cold temperatures with frequent freeze-thaw cycles. Frost wedging happens when water seeps into rock cracks, freezes, expands, and breaks the rock, which is the dominant physical weathering process in these cold, high-altitude regions. Options A is more common in arid areas, B is chemical weathering, D is also chemical weathering.

For question 8:

Physical weathering breaks rocks into smaller pieces without altering their chemical composition. Chemical weathering changes the rock's composition, elemental weathering is not a standard term, and density change is a property change, not a weathering type.

Answer:

1. C. Frost wedging
2. D. Physical weathering