Review 3 Our Planet - Soil Erosion worksheet - Free Printable

Let's solve the worksheet step by step.

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Question 5: Write the letters of each horizon and match their respective names.

We are given a cross-section of soil with five layers (horizons), and we need to identify them using the provided labels:

#### Soil Horizons (from top to bottom):
1. Top Soil – The topmost layer, rich in organic matter and plant roots.
2. Organic Matter – Often mixed into the topsoil; it includes decomposed plant and animal material.
3. Subsoil – Below the topsoil; contains less organic matter but more minerals.
4. Parent Rock – Partially broken-down rock that forms the subsoil.
5. Bedrock – Solid rock beneath all soil layers.

Now, let’s analyze the diagram:

- The top layer has grass and dark color → this is Top Soil.
- Just below it is a darker layer → this is Organic Matter (decomposing plant material).
- Next is a lighter brown layer → Subsoil.
- Then a lighter, sandy-looking layer → Parent Rock (partially weathered rock).
- The bottom layer is solid rock → Bedrock.

But note: In most soil profiles, the Organic Matter is often included in or just below the Top Soil, and sometimes they are combined.

However, based on the diagram and typical labeling:

From top to bottom, the layers are:
1. Top Soil (with grass)
2. Organic Matter (dark layer below topsoil)
3. Subsoil (lighter orange layer)
4. Parent Rock (pale, cracked layer)
5. Bedrock (solid stone at bottom)

Now, since the question says “write the letters of each horizon,” but no letters are labeled in the image — likely the student is expected to label them as A, B, C, D, E from top to bottom.

Assuming:
- A → Top Soil
- B → Organic Matter
- C → Subsoil
- D → Parent Rock
- E → Bedrock

Then match:

| Letter | Horizon Name |
|--------|--------------------|
| A | Top Soil |
| B | Organic Matter |
| C | Subsoil |
| D | Parent Rock |
| E | Bedrock |

✔ So fill in:
- First box (top) → A → Top Soil
- Second → B → Organic Matter
- Third → C → Subsoil
- Fourth → D → Parent Rock
- Fifth → E → Bedrock

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Question 6: Identify the name that corresponds to each image.

#### A)
Image shows rocks cracking and splitting apart. This is weathering.

- Process: Rocks break down due to temperature changes, water, etc.
- Label: Weathering

✔ Answer: Weathering

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#### B)
Image shows wind blowing over sand dunes, moving sand.

This is wind erosion.

- Wind carries away loose soil/sand particles.
- This is erosion caused by wind.

✔ Answer: Wind Erosion

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#### C)
Image shows:
- Arrow 1: Water flowing from high ground → Runoff
- Arrow 2: Water carrying sediment → Transportation
- Arrow 3: Sediment settling down → Deposition

This is a cycle of erosion, transportation, and deposition.

But the question asks for the name corresponding to each image — and here, it's showing a process involving all three.

But specifically:
- The whole scene shows water erosion.
- However, the labels are numbered:
- 1: Runoff
- 2: Transportation
- 3: Deposition

So the main process shown is Water Erosion.

But since the question says "identify the name that corresponds to each image", and there are boxes under each number, likely:

- Box under 1: Runoff
- Box under 2: Transportation
- Box under 3: Deposition

But the instruction says “identify the name that corresponds to each image” — so maybe the overall name?

Wait: Image C is one image with numbers.

Likely, they want:
- 1: Runoff
- 2: Transportation
- 3: Deposition

And possibly the whole process is Water Erosion.

But since there are separate boxes, probably fill:

- 1 → Runoff
- 2 → Transportation
- 3 → Deposition

Alternatively, if the blank is for the entire process, then Water Erosion.

But looking at the layout:
- Image A: one blank → Weathering
- Image B: one blank → Wind Erosion
- Image C: three blanks → likely for 1, 2, 3

So:

- 1: Runoff
- 2: Transportation
- 3: Deposition

✔ Final Answers:

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✔ Final Answers:

#### Question 5:
| Letter | Horizon Name |
|--------|--------------------|
| A | Top Soil |
| B | Organic Matter |
| C | Subsoil |
| D | Parent Rock |
| E | Bedrock |

(Write A–E from top to bottom in the left boxes, and match to the right.)

#### Question 6:
- A) → Weathering
- B) → Wind Erosion
- C)
- 1 → Runoff
- 2 → Transportation
- 3 → Deposition

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