Science worksheet diagram showing cloud types arranged by altitude, from high-level cirrus clouds down to low-level cumulonimbus storm clouds.

Let’s go step by step to name each cloud based on its shape and height.

We have three levels: High-level (above 20,000 ft), Mid-level (around 6,500–20,000 ft), and Low-level (below 6,500 ft).

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High-level clouds (top section):

1. The wispy, feathery clouds at the very top — these are Cirrus clouds. They look like thin strands or hooks.
2. The flat, layered cloud next to it — this is Cirrostratus. It looks like a thin veil covering part of the sky.

Wait — actually, looking again: the second one in high level has a wavy, rippled bottom — that’s more likely Cirrocumulus? No — let’s double-check standard types.

Actually, standard high-level clouds:
- Cirrus = wispy, curly
- Cirrostratus = thin, sheet-like, often covers whole sky
- Cirrocumulus = small white patches in rows (like fish scales)

In the image:
→ First high cloud: wispy → Cirrus
→ Second high cloud: flat with wavy base → That’s actually Cirrostratus? But wait — no, cirrostratus is usually uniform. Hmm.

Looking at common worksheets:

The first high cloud (wispy) = Cirrus

The second high cloud (flat, layered, slightly wavy) = Cirrostratus

But then below that, there’s a grid of tiny puffy dots — that’s definitely Cirrocumulus (mid-high level, but still classified as high).

Wait — the worksheet groups them under “High-level” together. So we have three clouds in high level? Let’s count the blank lines.

Actually, looking at the layout:

Top row (high-level):
- Left: wispy cloud → Cirrus
- Right: flat, layered cloud → Cirrostratus

Then below that, still in high-level section: a field of small rounded clouds → Cirrocumulus

So three high-level clouds? But only two blanks shown? Wait — let me re-examine the structure.

Actually, the worksheet has:

Under “High-level”:
- One blank under the wispy cloud
- One blank under the flat cloud
- Then below that, another set of clouds (the dotted ones) with one blank under them — so that’s third high-level cloud.

Similarly for mid and low.

So let’s list all:

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High-level (above 20,000 ft):

1. Wispy, feather-like → Cirrus
2. Flat, layered, sometimes wavy → Cirrostratus
3. Small, round, patchy clouds in rows → Cirrocumulus

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Mid-level (6,500 – 20,000 ft):

1. Layered, grayish, cover sky → Altostratus (the big flat one)
2. Puffy, cotton-ball like in groups → Altocumulus (the cluster of small puffs)

Wait — in the image:

Mid-level section:
- Left: group of small puffy clouds → Altocumulus
- Right: large flat layer → Altostratus

Yes.

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Low-level (below 6,500 ft):

1. Fluffy, cotton ball, fair weather → Cumulus
2. Dark, rain-producing, tall tower → Cumulonimbus (the huge one with rain)
3. Gray, uniform layer, drizzle → Stratus (the flat low one)
4. Another flat low one? Wait — there are two flat low clouds? Actually:

Looking at low-level:

- Bottom left: fluffy cloud → Cumulus
- Below that: flat gray layer → Stratus
- Middle right: raining puff → Nimbostratus? Or Cumulus congestus? Wait — the one with rain coming from a puffy base is often called Nimbostratus if it’s layered, but here it’s puffy with rain — could be Cumulus mediocris or just rainy cumulus.

Standard low-level clouds:

- Cumulus: puffy, fair weather
- Stratus: flat, gray, overcast
- Nimbostratus: thick, dark, continuous rain
- Cumulonimbus: towering, thunderstorms

In the image:

Low-level:
- Left: single puffy cloud → Cumulus
- Below it: flat gray layer → Stratus
- Center: puffy cloud with rain → This is likely Nimbostratus? But nimbostratus is usually flat. Actually, this might be Cumulus congestus turning into storm, but for basic worksheets, they often label the raining puffy one as Nimbostratus or sometimes just “rain cloud”.

Wait — better to use standard names:

Actually, the cloud with vertical development and heavy rain at bottom is Cumulonimbus — but that’s the giant one on the right.

The smaller raining cloud in middle-low is probably Nimbostratus? No — nimbostratus is layered.

Perhaps it’s Stratocumulus? No.

Let me think differently.

Common school worksheet answers:

For low-level:

- The fluffy isolated cloud: Cumulus
- The flat gray layer: Stratus
- The cloud producing steady rain (not thunderstorm): Nimbostratus
- The giant thunderhead: Cumulonimbus

In the image:

Bottom row (low-level):

Left column:
- Top: puffy cloud → Cumulus
- Bottom: flat layer → Stratus

Right column:
- Top: puffy cloud with light rain → This is tricky. In many worksheets, this is labeled Nimbostratus, even though technically nimbostratus is layered. Alternatively, it might be considered a type of cumulus, but I think for simplicity, they expect Nimbostratus here.
- Bottom: the huge towering cloud with heavy rain → Cumulonimbus

Also, there’s another flat cloud at bottom right? Wait — looking again:

At very bottom, there are two flat clouds: one under stratus, one under cumulonimbus? No — the worksheet shows:

After the main low-level clouds, there are two more flat clouds at the very bottom — those are probably also stratus or stratocumulus, but since they’re at ground level, maybe fog? But not labeled.

Actually, counting the blanks:

In low-level section, there are four blanks:

1. Under the puffy cloud (left) → Cumulus
2. Under the flat cloud below it → Stratus
3. Under the raining puffy cloud (center) → Nimbostratus? Or perhaps it's meant to be "Cumulus" with rain, but standard answer is often Nimbostratus for rain clouds that aren't thunderstorms.
4. Under the giant cloud → Cumulonimbus

And then at the very bottom, two more flat clouds — but they might be duplicates or part of the same category.

To avoid confusion, let’s match standard educational materials.

I recall a similar worksheet online — the answers are typically:

High-level:
- Cirrus
- Cirrostratus
- Cirrocumulus

Mid-level:
- Altocumulus
- Altostratus

Low-level:
- Cumulus
- Stratus
- Nimbostratus
- Cumulonimbus

Yes, that fits.

Now assigning to positions:

In the image:

High-level:
- Top left: wispy → Cirrus
- Top right: flat layered → Cirrostratus
- Below them: dotted pattern → Cirrocumulus

Mid-level:
- Left: cluster of small puffs → Altocumulus
- Right: large flat layer → Altostratus

Low-level:
- Left: single puffy → Cumulus
- Below it: flat gray → Stratus
- Center: puffy with rain → Nimbostratus (even though it's puffy, in worksheets it's often used for rain clouds)
- Right: giant tower with rain → Cumulonimbus

Perfect.

So final naming:

High-level:
1. Cirrus
2. Cirrostratus
3. Cirrocumulus

Mid-level:
4. Altocumulus
5. Altostratus

Low-level:
6. Cumulus
7. Stratus
8. Nimbostratus
9. Cumulonimbus

But wait — in the image, how many blanks are there?

Counting the underscores:

High-level: 3 blanks (one under each cloud group)
Mid-level: 2 blanks
Low-level: 4 blanks

Total 9 blanks.

Yes.

So order from top to bottom, left to right:

First row (high):
- Left cloud: Cirrus
- Right cloud: Cirrostratus
- Below them (still high): Cirrocumulus

Second row (mid):
- Left cloud group: Altocumulus
- Right cloud: Altostratus

Third row (low):
- Left puffy: Cumulus
- Below it flat: Stratus
- Center raining puffy: Nimbostratus
- Right giant: Cumulonimbus

Yes.

Final Answer:
Cirrus, Cirrostratus, Cirrocumulus, Altocumulus, Altostratus, Cumulus, Stratus, Nimbostratus, Cumulonimbus