Question

plant and animal activities affect the rate of what kind of weathering?
a. mechanical
b. chemical
c. chemical and mechanical
d. none

1. glacial lakes can form through

a. neither erosion nor deposition.
b. erosion and deposition.
c. glaciation and subduction.
d. only erosion.

1. a common form of mechanical weathering that results from the freezing and thawing of rock and that is strong enough to split even huge boulders is called

a. exfoliation.
b. crackling.
c. ice wedging.
d. abrasion.

1. which of the following is not a process of chemical weathering?

a. carbonation
b. acid precipitation
c. oxidation
d. exfoliation

1. topography with high mountains and steep slopes are especially vulnerable to what type of weathering?

a. chemical
b. none
c. mechanical
d. chemical and mechanical

1. which of the following is true of lakes?

a. most are located at low altitudes.
b. most last a long time in geologic terms.
c. most are short - lived in geologic terms.
d. most are extremely old in geologic terms.

1. abrasion is caused by all of the following agents except

a. ice wedging.
b. wind.
c. running water.
d. gravity.

1. how does the amount of a rocks surface area affect weathering?

a. the larger the area, the lower the rate of weathering.
b. the smaller the area, the higher the rate of weathering.
c. the larger the area, the higher the rate of weathering.
d. the rate of weathering is unaffected by the surface area.

1. what two processes are all landforms subject to?

a. slump and erosion
b. uplift and erosion
c. gravity and exfoliation
d. exfoliation and friction

1. a massive sheet of ice that may cover millions of square kilometers is a(n)

a. ice slick.
b. land mass.
c. continental glacier.
d. alpine glacier.

Explanation:

• Question 9: Plant and animal activities can cause both mechanical (e.g., root growth in cracks) and chemical (e.g., organic acid production) weathering.
• Question 10: Glacial lakes form when glaciers erode the land and then deposit material to dam the resulting depressions.
• Question 11: Ice wedging occurs when water seeps into cracks, freezes (expanding), and thaws, gradually splitting rocks.
• Question 12: Exfoliation is a mechanical weathering process (due to pressure release), while carbonation, acid precipitation, and oxidation are chemical.
• Question 13: High mountains and steep slopes are prone to mechanical weathering (e.g., rockfall due to gravity).
• Question 14: Most lakes are short - lived in geologic terms as they can be filled by sedimentation.
• Question 15: Ice wedging is a separate weathering process; abrasion is caused by wind, running water, and gravity - driven movement.
• Question 16: A larger surface area means more exposure to weathering agents, increasing the rate.
• Question 17: Uplift creates landforms, and erosion modifies them; all landforms are subject to these.
• Question 18: A continental glacier is a large ice sheet; an alpine glacier is in mountains.

Answer:

1. d. chemical and mechanical
2. b. erosion and deposition
3. c. ice wedging
4. d. exfoliation
5. c. mechanical
6. c. Most are short - lived in geologic terms
7. a. ice wedging
8. c. The larger the area, the higher the rate of weathering
9. b. uplift and erosion
10. c. continental glacier