Question

section 1 — multiple choice

1. mechanical weathering involves—

a. changing the chemical composition of a rock
b. breaking rocks into smaller pieces without changing composition
c. occurs only in warm climates
d. forms new minerals

1. frost wedging occurs because—

a. water dissolves minerals
b. water freezes and expands inside rock cracks
c. heat causes rocks to peel
d. sediment becomes compacted

1. which process is responsible for moving weathered material from one place to another?

a. weathering
b. erosion
c. deposition
d. cementation

1. gravity is the driving force behind—

a. oxidation
b. mechanical weathering
c. erosion
d. soil formation

1. running water, waves, glaciers, and wind are agents of—

a. weathering
b. deposition
c. erosion
d. soil horizons

1. a mass movement caused by water - saturated soil flowing like thick liquid is—

a. creep
b. mudflow
c. slump
d. rockfall

Explanation:

Question 1

Mechanical weathering is the physical breakdown of rocks into smaller pieces without altering their chemical composition. Option A is chemical weathering, C is incorrect (mechanical weathering occurs in various climates), D is also chemical weathering - related. So B is correct.

Frost wedging happens when water enters rock cracks, freezes (expands), and forces the rock apart. A is dissolution (chemical), C is thermal weathering but not the cause of frost wedging, D is sedimentary process. So B is correct.

Erosion is the process of moving weathered material from one location to another. Weathering is breaking down, deposition is dropping material, cementation is part of sedimentary rock formation. So B is correct.

Answer:

B. Breaking rocks into smaller pieces without changing composition

Question 2