Educational worksheet for sorting images of weathering and erosion processes.

Let me carefully examine the images and match them to the correct definitions.

First, I'll identify what each picture shows:

1. Tree growing on cracked rock — roots are splitting the rock apart.
2. Wind blowing over sand dunes — moving sand.
3. River flowing through a forested landscape — carrying sediment downstream.
4. Wind blowing over farmland with plowed soil — moving soil particles.
5. Sea cliffs with rock pillars (sea stacks) — formed by wave action wearing away softer rock.
6. Natural arch (like a sandstone arch) — formed by wind/water eroding rock over time.

Now, recall the definitions:
- Weathering: Wind, water, or ice *break* the rocks (physical/chemical breakdown *in place*).
- Erosion: Wind, water, or ice *move* the sediments (transport of broken material).

So let’s classify each image:

1. Tree roots cracking rock → Weathering (rock is breaking *in place*).
2. Wind moving sand → Erosion (sediment is being transported).
3. River carrying sediment → Erosion (river moves material downstream).
4. Wind moving soil from field → Erosion (soil particles are blown away).
5. Sea stacks — result of waves eroding cliffs → Erosion (material removed and carried away).
6. Natural arch — formed by wind/water wearing away rock *in place* → This is Weathering (the rock is being broken down *where it stands*), though erosion often follows. But the key visual is the arch *still standing*, shaped by gradual breakdown — classic example of *weathering* (especially mechanical/abrasion), and many textbooks classify arches as weathering features before erosion removes the pieces.

Wait — let me double-check standard classification:

- Cracks from roots: Weathering
- Sand dunes shifting: Erosion
- River with sediment load: Erosion
- Wind blowing soil: Erosion
- Sea stacks: formed by *erosion* (waves remove surrounding rock)
- Natural arch: formed by *weathering* (wind/water weaken rock, then parts fall away — but the arch itself remains due to differential weathering; however, the process that creates the hole is often called weathering, while removal of debris is erosion). In elementary science, arches are typically taught as results of weathering (especially when shown with wind swirling around it, as in this image).

Looking again at image 6: It shows wind blowing *around* the arch, not removing material — suggesting the arch is being shaped *in place* → Weathering.

Image 5: Sea stacks with waves hitting base — clearly material is being carried away → Erosion.

So final grouping:

Weathering:
- Tree roots cracking rock
- Natural arch with wind

Erosion:
- Wind moving sand (dunes)
- River moving sediment
- Wind moving soil (farm field)
- Sea stacks (wave erosion)

That’s 2 for Weathering, 4 for Erosion.

But wait — the worksheet has 6 pictures total, and two columns. Let me count again:

Top row: 4 images
Bottom row: 2 images
Total = 6.

Yes:
1. Tree on rock
2. Sand dunes + wind
3. River valley
4. Farm field + wind
5. Sea stacks
6. Natural arch

Standard curriculum alignment:
- Roots breaking rock → Weathering ✔
- Wind shaping sand dunes → Erosion (dunes migrate via wind transport) ✔
- River carrying sediment → Erosion ✔
- Wind blowing topsoil → Erosion ✔
- Sea stacks → formed by Erosion (waves erode headland) ✔
- Natural arch → formed by Weathering (wind/water wear away softer rock layers *in place*) ✔

Thus:
- Weathering: images 1 and 6
- Erosion: images 2, 3, 4, and 5

Final Answer:
Weathering: tree-on-rock, natural arch
Erosion: sand dunes, river scene, farm field, sea stacks

But since the question says “Paste the pictures in the corresponding space”, and we must give only the final answer (as ExplainAnswer = false), I’ll list which pictures go where — but the format expects just the answer.

Since it's a sorting task, the expected output is likely the grouping.

Given the instructions: “Provide only the final correct answer.” — and this is a classification, the cleanest format is:

Weathering: Picture 1, Picture 6
Erosion: Picture 2, Picture 3, Picture 4, Picture 5

But the user didn’t number them. However, in such worksheets, order is left-to-right, top-to-bottom.

Let me assign labels by position:

A: tree on rock
B: sand dunes
C: river valley
D: farm field
E: sea stacks
F: natural arch

So:
Weathering: A, F
Erosion: B, C, D, E

I’ll output that.

Final Answer:
Weathering: A, F
Erosion: B, C, D, E