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Types of Weathering Worksheet

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Types of Weathering Worksheet

Read the field notes and solve each task. Weathering breaks rock down where it is; erosion carries the broken material away.

A field report from the coast

After a wet, cold winter, a group of geologists examines a rocky coastline. They find water-filled cracks in a cliff, a plant root wedged into a crack, and rounded stones on the beach. The coast is hit by rain and sea spray. The geologists explain that weathering happens in several ways. In freeze–thaw weathering, water enters a crack, freezes and expands, then thaws. Repeated cycles can widen the crack until pieces break off. In biological weathering, growing roots push against rock and may split it. In chemical weathering, slightly acidic rainwater reacts with some minerals and slowly changes or dissolves them. In physical weathering, rock breaks into smaller pieces without changing its minerals. Waves can wear down rocks by impact and by grinding stones against them; they can also carry the pieces away, which is erosion.

1.Which clue shows freeze–thaw weathering? Explain the two stages that make the crack wider.
2.The root grows thicker inside a crack. Name this type of weathering and explain how it acts on the rock.
3.Which clue is an example of chemical weathering? What happens to the rock’s minerals?
4.Waves smash pebbles against a cliff and grind stones together. Is this physical or chemical weathering? Give a reason.

Sort the evidence

Use the field report and the clues to decide which process is happening.

5.Match each process to its description. Remember that freeze–thaw is one type of physical weathering.
  • Freeze–thaw
  • Biological
  • Chemical
  • Physical (other than freeze–thaw)
  • A growing root pushes against rock
  • Wave impact and grinding break rock into smaller pieces without mineral change
  • Water freezes in a crack, expands and widens it
  • Rainwater changes or dissolves minerals
6.A piece of cliff breaks off after many freeze–thaw cycles, then waves carry it down the coast. Which part is weathering, and which part is erosion?
7.True or false: Chemical weathering always breaks rock into smaller pieces without changing its minerals. Correct the statement if it is false.
TrueFalse
8.Complete the explanation: In freeze–thaw weathering, water enters a crack. When it freezes, it . Repeated cycles can the crack.
9.A geologist finds smooth, rounded stones on a beach. Suggest how waves may have helped make them rounded.
10.Design a fair investigation to test whether repeated freezing and thawing can break a rock more than keeping it at a steady temperature. State what you would change, what you would measure, and one factor to keep the same.

3 printable pages

  • Types of Weathering Worksheet, page 1 of 3: A field report from the coast

    Page 1

  • Types of Weathering Worksheet, page 2 of 3: Sort the evidence

    Page 2

  • Types of Weathering Worksheet, page 3 of 3: 10. Design a fair investigation to test whether repeated freezing and thawing can break a…

    Page 3

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