Practice worksheet on geological terms and weathering types.

Let's solve this step-by-step.

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Part 1: Match the definition with the correct term

We are given 10 definitions and 10 terms (A–J). We need to match each number (1–10) with the correct letter.

#### Definitions & Terms:

1. Time-period on Earth when glaciers caused erosion.
→ This refers to a period of extensive glaciation, known as the Ice Age.
✔ Answer: F

2. Rocks crashing into other rocks breaking off more particles.
→ This is a physical process where rocks break apart due to impact — a form of abrasion.
✔ Answer: A

3. Decomposing, breaking up, or changing the color of rocks.
→ This describes weathering, which includes physical, chemical, and biological breakdown of rocks.
✔ Answer: I

4. Flat area of land that is higher than the land surrounding it.
→ This is a plateau.
✔ Answer: H

5. Movement or rocks and sediment that have broken apart.
→ This is erosion, the movement of weathered material by wind, water, ice, etc.
✔ Answer: C

6. May include sand, rocks, pebbles, soil, dust and other particles.
→ These are all types of sediments.
✔ Answer: I

Wait — both #3 and #6 seem to point to "I" (Sediments)? Let’s double-check.

- #3: "Decomposing, breaking up..." → This is weathering → Weathering = I? Wait — no! The list says:
- I = Sediments
- J = Weathering

So correction:
- #3 → Weathering → J
- #6 → Sediments → I

Yes, that makes sense.

So:
- #3: J
- #6: I

Let’s continue.

7. The person who studies rocks and minerals.
→ That’s a geologist.
✔ Answer: D

8. A natural feature of the Earth's surface.
→ This is a landform.
✔ Answer: G

9. The study of rocks and minerals.
→ That’s geology.
✔ Answer: E

10. The process of sediments reaching their destination.
→ This is deposition — when sediments are dropped or deposited.
✔ Answer: B

Now let’s compile the answers for Part 1:

| # | Answer |
|---|--------|
| 1 | F (Ice Age) |
| 2 | A (Abrasion) |
| 3 | J (Weathering) |
| 4 | H (Plateau) |
| 5 | C (Erosion) |
| 6 | I (Sediments) |
| 7 | D (Geologist) |
| 8 | G (Landform) |
| 9 | E (Geology) |
| 10 | B (Deposition) |

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Part 2: Tell whether each example is Chemical (C), Mechanical (M), or Biological (B) weathering

We need to classify each situation.

11. Baseball-sized hail began to smash against the hillside breaking apart the soil.
→ Physical force breaking things apart → Mechanical (M)
✔ Answer: M

12. Salt water enters a rock, water dries, salt crystals grow and wedge the rock apart.
→ Salt crystals expanding and physically breaking rock → Mechanical (M)
✔ Answer: M

13. Minerals in rocks dissolve forming stalactites/stalagmites in a cave.
→ Dissolving of minerals (like limestone) by water → Chemical (C)
✔ Answer: C

14. The tree roots are causing the concrete slabs of a sidewalk to break apart.
→ Roots grow and push apart the concrete → Biological (B)
✔ Answer: B

15. The wind and rain has caused damage to the tombstones in a cemetery.
→ Wind and rain can cause abrasion and chemical changes (e.g., acid rain), but this is likely chemical if it's weathering over time. However, “wind and rain” often implies mechanical (abrasion), but acid rain could be chemical. But since it says “damage,” and not specifying acid, it's probably mechanical. But wait — rain alone isn’t mechanical unless it’s freezing/thawing. But here, it’s just wind and rain.

But actually, rain and wind together may cause mechanical erosion (abrasion), but weathering is the breakdown in place. So if it's damaging tombstones, it's likely chemical due to acid rain or biological if moss/lichen.

But the sentence says “wind and rain” — most likely mechanical (abrasion from wind-blown particles and water). But let’s consider context: tombstones made of stone — common issue is chemical weathering from acid rain.

So: Chemical (C) — because acid rain (CO₂ + water → carbonic acid) reacts with limestone.

✔ Answer: C

16. A seed has found its way into a rock and a plant is beginning to split the small stone.
→ Plant roots growing and breaking rock → Biological (B)
✔ Answer: B

17. The pollution has recently been high, and acid rain is destroying some monuments.
→ Acid rain causes chemical reactions with stone (especially limestone) → Chemical (C)
✔ Answer: C

18. A combination of fungi and algae grow upon the surface of a rock slowly "eating it away".
→ Living organisms breaking down rock → Biological (B)
✔ Answer: B

19. Flooding has caused a landslide and part of the hillside has been affected.
→ This is mass wasting (a type of erosion), not weathering. But the question asks about weathering. However, flooding can lead to mechanical weathering via erosion, but the process of landslides is mechanical movement.

But note: Landslide is not weathering — it's erosion/mass wasting. But the question says “caused a landslide” — so the cause might be weathering, but the event itself is not weathering.

However, the prompt says: “Tell whether each example is Chemical (C), Mechanical (M), or Biological (B) weathering.” So we’re to determine if the example is an instance of one of those.

But flooding causing a landslide is not weathering — it’s erosion. But perhaps the weakening of the slope was due to weathering?

But the statement doesn't say what caused the weakening — just that flooding caused a landslide.

So this is not weathering — it's erosion. But the options are only C, M, B.

Wait — maybe the question assumes the process being described is weathering? But it clearly says flooding caused a landslide, which is not weathering.

But perhaps we interpret it as mechanical weathering due to water pressure or freeze-thaw?

No — flooding is not weathering. It's transportation/erosion.

But since it's listed here, and the answer must be one of C, M, B, perhaps it's mechanical due to water movement?

Alternatively, maybe the water seeping into cracks and causing expansion (freeze-thaw) is implied?

But it says “flooding” — sudden water flow.

In many contexts, floodwaters can cause mechanical weathering by dislodging particles.

But more accurately, flooding is erosion, not weathering.

But since the question asks us to classify it as C, M, or B weathering, and it's not weathering, we might assume it's mechanical due to the force.

But let’s think: Weathering happens in place. Erosion moves material.

A landslide involves movement — so it's erosion, not weathering.

But perhaps the trigger was mechanical weathering (e.g., water weakening slopes).

But the example says: “Flooding has caused a landslide” — so the flooding is the cause.

But flooding is not weathering — it’s erosion.

So perhaps this is not weathering at all.

But since it's included, and we must choose, the best fit is Mechanical (M) — because water moving and displacing material is mechanical.

But again, mechanical weathering is in place — like frost wedging.

Here, it's transport.

So possibly, this is not weathering — but the question may expect M.

Alternatively, water soaking into cracks and causing swelling — but that's not mentioned.

Given the ambiguity, but based on standard classifications, flooding causing a landslide is not weathering — it's erosion.

But since it's asked, and the answer choices are only C, M, B, we’ll go with M — Mechanical — because it involves physical force.

✔ Answer: M (with caution)

20. The salty water of the ocean is eating away the concrete support posts of the pier.
→ Saltwater reacting with concrete — this is chemical weathering (salt crystallization, or chemical reaction with cement).
Also, salt can cause physical damage, but “eating away” suggests chemical action.

But salt crystallization is mechanical (crystals grow and expand).

But here, “salty water” is seeping in, drying, salt crystals grow → Mechanical (M).

But “eating away” might suggest chemical.

Actually, salt crystallization is mechanical weathering.

So even though it’s “eating away”, it’s due to physical expansion of salt crystals.

So → Mechanical (M)

But also, seawater can cause chemical reactions with concrete (e.g., sulfate attack).

But in most cases, salt crystallization is classified as mechanical weathering.

✔ Answer: M

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✔ Final Answers:

#### Part 1: Matching Definitions
1. F
2. A
3. J
4. H
5. C
6. I
7. D
8. G
9. E
10. B

#### Part 2: Weathering Type
11. M
12. M
13. C
14. B
15. C
16. B
17. C
18. B
19. M
20. M

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🔍 Explanation Summary:

- Weathering breaks down rocks in place.
- Mechanical: physical breakdown (no change in composition).
- Chemical: changes mineral composition.
- Biological: living organisms cause breakdown.

- Erosion is the movement of weathered material.
- Deposition is when sediments are dropped.
- Ice Age: Period of widespread glaciation.
- Geology = study of Earth; Geologist = person who studies it.
- Landform = natural feature (e.g., plateau).
- Sediments = loose particles (sand, gravel, etc.).

This worksheet helps reinforce vocabulary related to Earth processes.

Let me know if you'd like a printable version or explanation of any specific term!