Soil Layers online activity - Free Printable

Let's solve this step-by-step based on the image you've provided.

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Task Overview:

The worksheet asks students to label the soil layers in a cross-section diagram of the ground. The words to choose from are:

- bedrock
- layers
- topsoil
- subsoil
- bits of rocks

We need to match these terms to the correct numbered layers in the diagram.

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Step 1: Understand the Soil Layers (from top to bottom)

Soil is made up of several distinct layers, also called horizons, and they go from the surface down:

1. Topsoil – The uppermost layer, rich in organic matter and nutrients. This is where plants grow.
2. Subsoil – Below the topsoil, contains less organic material and more minerals and clay.
3. Parent material – Sometimes shown as a layer with small rocks or broken-down rock (often referred to as "bits of rocks").
4. Bedrock – The solid rock layer at the bottom, which is unweathered and hard.

But note: In this diagram, the word "layers" is also given — but it’s likely not a layer itself, rather a general term. So we’ll use it carefully.

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Step 2: Analyze the Diagram

Looking at the image:

- Layer 1 (top): Green grass on top of dark brown soil → This is topsoil.
- Layer 2: Darker brown with some cracks and roots → This is still part of the topsoil or possibly transitioning into subsoil? But since only one label per number, and we have five blanks, let’s count the layers:

Actually, there are five sections labeled:
1. Top (with grass)
2. Just below that
3. Middle orange layer
4. Grayish with stones
5. Bottom rocky layer

Wait — the first box says "Soil ________", so it's asking for the name of the entire system — likely layers.

So let's re-express:

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Step 3: Fill in the Blanks

#### 1. Soil ________
This is asking what the whole structure is called. The best fit is layers, because we're looking at soil layers.

✔ So: Soil layers

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Now, the numbered parts on the left correspond to the layers from top to bottom:

#### 2. → Top layer (with grass) → Topsoil
✔ This is the richest layer, where plants grow.

#### 3. → Layer just beneath topsoil → Subsoil
✔ It's darker, denser, and has less organic matter.

#### 4. → Layer with small rocks → Bits of rocks
✔ This is often the parent material, where rocks begin to break down.

#### 5. → Bottom layer, solid rock → Bedrock
✔ This is the hard, solid rock underneath all soil layers.

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✔ Final Answers:

1. Soil layers
2. Topsoil
3. Subsoil
4. Bits of rocks
5. Bedrock

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Explanation Summary:

- Topsoil: The top layer where plants grow; rich in nutrients and organic matter.
- Subsoil: Below topsoil; contains more minerals and less organic matter.
- Bits of rocks: A transitional layer with fragments of weathered rock.
- Bedrock: Solid rock at the bottom; the foundation of the soil profile.

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🟩 Final Answer:

1. Soil layers
2. Topsoil
3. Subsoil
4. Bits of rocks
5. Bedrock

✔ These are the correct labels based on standard soil science and the visual cues in the diagram.