Question

1. ice wedging is the freezing and expansion of water that has entered a crack in a rock, resulting in the rock being split apart.

a. true
b. false

1. the type of weathering in which rocks break into smaller pieces without any alteration in their chemical composition is called physical weathering.

a. true
b. false

1. ice wedging is common where temperatures frequently move above and below freezing.

a. true
b. false

1. moving water can cause abrasion by

a. tumbling rocks together
b. dissolving the rock
c. ice wedging
d. none of these

Explanation:

Question 7

Ice wedging occurs when water enters rock cracks, freezes (expands), and splits the rock. The statement matches this definition.

Physical weathering is the breakdown of rocks into smaller pieces without changing their chemical composition (unlike chemical weathering). The statement defines physical weathering correctly.

Ice wedging needs water to freeze and thaw (temperatures above and below freezing) to repeatedly expand and contract in rock cracks. So it’s common in such temperature - fluctuating areas.

Answer:

a. TRUE

Question 8