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1 Weathering and the Breakdown of Rock Online Quiz Questions

Use this free practice quiz with 20 questions to review 1 Weathering and the Breakdown of Rock, test your knowledge, and prepare for your next test or exam.

20 questions
01
Choose one
1 point

A rock breaks down where it is exposed, and its fragments are later carried downslope by water. Which statement correctly distinguishes the two processes?

  1. A

    Weathering transports rock fragments downhill, while erosion alters minerals in place.

  2. B

    Weathering breaks down or alters rock in place, while erosion transports material.

  3. C

    Weathering changes only soil, while erosion changes only bedrock.

  4. D

    Weathering and erosion both refer only to chemical reactions.

02
Choose one
1 point

Water repeatedly enters a crack in a rock, freezes, expands, and widens the crack. Which process is chiefly responsible for this physical breakdown?

  1. A

    Frost wedging

  2. B

    Hydrolysis

  3. C

    Oxidation

  4. D

    Exfoliation

03
True or false
1 point

A rock fractures into smaller pieces, but the chemical composition of its constituent minerals remains unchanged. This is physical weathering.

  1. A

    True

  2. B

    False

04
Fill in the blank
1 point

Carbon dioxide dissolves in water to form a weak acid that reacts with carbonate minerals. This chemical weathering process is called .

05
Written response
1 point

Feldspar in granite reacts with water and is altered into clay minerals. What chemical weathering process does this example illustrate?

06
Choose one
1 point

After overlying rock is removed, the newly exposed outer layers expand and peel away in sheets. Which process best explains this change?

  1. A

    Salt-crystal growth

  2. B

    Thermal contraction

  3. C

    Exfoliation

  4. D

    Dissolution

07
Fill in the blank
1 point

Slightly acidic water dissolves calcite in limestone, gradually enlarging cracks and cavities. This process is called .

08
True or false
1 point

Steep slopes often lose loose weathered material more readily, while gentler or lower areas can accumulate it.

  1. A

    True

  2. B

    False

09
Choose all
1 point

Which statements correctly describe weathering? Select all that apply.

  1. A

    Breaking rock into smaller pieces can expose more surface area without changing mineral composition.

  2. B

    Chemical reactions can dissolve minerals or transform them into new minerals.

  3. C

    Smaller fragments can provide more surface area for water and air to interact with.

  4. D

    Moving weathered sediment away from its original location is physical weathering.

10
Written response
1 point

Which weathering control factor includes the shape and slope of the land, affecting water movement and the retention of loose material?

11
Choose one
1 point

Two similar rocks are exposed for the same length of time. Which climate is generally more likely to support faster chemical weathering?

  1. A

    Cold, dry conditions generally support faster chemical reactions because less water is present.

  2. B

    Warm, wet conditions generally support faster chemical reactions than cold, dry conditions.

  3. C

    Climate has no influence on chemical weathering rates.

  4. D

    Warm, dry conditions always prevent chemical weathering.

12
Choose all
1 point

Which examples show how conditions or processes can interact to influence weathering? Select all that apply.

  1. A

    Water enters a crack and freezes, widening it; later, water carries dissolved substances deeper into the rock.

  2. B

    Roots widen a fracture while acids released by organisms react with minerals.

  3. C

    Slope affects both water movement and how long weathered material remains in place.

  4. D

    Once a rock is fractured, climate and organisms no longer affect its weathering.

13
Open ended
1 point

Explain how weathering contributes to the development of regolith and soil. In your answer, distinguish regolith from soil and describe one way the development sequence may be interrupted.

14
Choose one
1 point

A rock develops rust-like discoloration after oxygen reacts with minerals that contain iron. Which process caused this chemical change?

  1. A

    Oxidation

  2. B

    Carbonation

  3. C

    Frost wedging

  4. D

    Hydrolysis

15
True or false
1 point

Living organisms can weather rock both physically, by widening fractures, and chemically, by releasing compounds that react with minerals.

  1. A

    True

  2. B

    False

16
Choose one
1 point

A rock in a dry region develops loosened grains after salty water repeatedly enters its pores and evaporates. Which process most directly explains the change?

  1. A

    Water freezes in cracks and expands.

  2. B

    Salt crystals grow in pores and cracks as water evaporates.

  3. C

    Oxygen reacts with iron-bearing minerals.

  4. D

    Feldspar reacts with water and changes into clay minerals.

17
Choose one
1 point

Water reacts with feldspar in granite, altering it into clay minerals. Which chemical weathering process is illustrated?

  1. A

    Dissolution

  2. B

    Oxidation

  3. C

    Hydrolysis

  4. D

    Frost wedging

18
Written response
1 point

Oxygen reacts with iron-bearing minerals in a rock, producing iron oxides. What chemical weathering process is occurring?

19
Choose one
1 point

Which statement best describes how living organisms can contribute to rock weathering?

  1. A

    Roots may widen fractures, and some organisms may release compounds that react with minerals.

  2. B

    Roots only alter minerals chemically and cannot widen fractures.

  3. C

    Organisms weather rock only by transporting fragments away.

  4. D

    Lichens and roots prevent chemical reactions by sealing fractures.

20
Written response
1 point

What is the general name for the layer of loose or weathered material above solid bedrock, which may include rock fragments, sediment, and soil?