Comprehensive science worksheet helping students identify and label the external anatomy of a baleen whale.

Let's solve this step-by-step based on the worksheet titled "Body Parts of a Whale".

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Part 1: Label the body parts of a baleen whale

We are given a diagram of a baleen whale with blank boxes pointing to different parts. Here’s how to label them:

From left to right and top to bottom (based on typical diagrams):

1. Blowhole – Located on top of the head; where whales breathe.
2. Eye – Small, located near the front of the head.
3. Dorsal fin – The small fin on the back (though some baleen whales lack it).
4. Pectoral fin – The flipper-like limbs on the sides.
5. Mouth – The opening used for feeding.
6. Tail fluke – The horizontal tail at the end, used for swimming.

> So the labels should be:
> - Top left → Blowhole
> - Top middle → Dorsal fin
> - Top right → Tail fluke
> - Bottom left → Eye
> - Bottom middle → Pectoral fin
> - Bottom right → Mouth

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Part 2: Fill in the blanks

Now let’s answer each question:

1) There are two _flukes_ on a whale’s tail.
→ Correct answer: flukes (the two lobes of the tail)

2) A baleen whale has two nostrils, called _blowholes_.
→ Baleen whales have one or two blowholes (usually two). They are called blowholes.

3) A baleen whale has thick _skin_ with no eyelashes.
→ Yes, they have thick skin, and their eyes do not have eyelashes.

4) Whales have two _fins_ to help them swim.
→ More accurately: pectoral fins (or flippers), but "fins" is acceptable.

5) Most whales have a _dorsal fin_ to keep them stable when swimming.
→ Many whales have a dorsal fin, though some (like blue whales) don’t. But this is generally true for many species.

6) Baleen whales have _baleen plates_ in their mouths instead of teeth.
→ This is correct. Baleen plates filter food from water.

7) Baleen whales have _throat pleats_ so their throats can expand.
→ These are also called ventral grooves, which allow the throat to stretch when swallowing large amounts of water and krill.

✔ Final answers:
1) flukes
2) blowholes
3) skin
4) fins (or pectoral fins)
5) dorsal fin
6) baleen plates
7) throat pleats (or ventral grooves)

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Part 3: Differences between a baleen whale and a toothed whale

Draw an arrow to the features that differ and explain.

Key differences:

| Feature | Baleen Whale | Toothed Whale |
|--------|--------------|----------------|
| Feeding | Uses baleen plates to filter food (krill, small fish) | Has teeth to catch prey (fish, squid, seals) |
| Teeth/Baleen | No teeth; has baleen plates | Has sharp teeth |
| Blowhole | Two blowholes (in most) | One blowhole |
| Size | Generally larger (e.g., blue whale) | Smaller (e.g., dolphins, sperm whales) |
| Social behavior | Often more solitary or in small groups | Often social, pods |

How to draw and explain:

- Draw an arrow pointing to the mouth area of the whale.
- Write: *"Baleen whales have baleen plates instead of teeth. Toothed whales have sharp teeth to catch prey."*
- Optionally, draw an arrow to the blowhole and write: *"Baleen whales have two blowholes; toothed whales have one."*

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Part 4: How are whales different from fish?

Draw an arrow to a feature and explain.

Choose a key difference:

- Arrow to the blowhole:
*"Whales breathe air through blowholes on top of their heads, while fish breathe underwater using gills."*

- Arrow to the tail:
*"Whales move up and down with their tail flukes, while fish move side to side with their tails."*

- Arrow to the body shape:
*"Whales are mammals with warm blood and give birth to live young, while fish are cold-blooded and lay eggs."*

✔ Best explanation:
👉 Arrow to blowhole → *"Whales are mammals and must come to the surface to breathe air. Fish have gills and extract oxygen from water."*

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✔ Final Summary

Labeling:
- Blowhole
- Dorsal fin
- Tail fluke
- Eye
- Pectoral fin
- Mouth

Fill-in-the-blanks:
1. flukes
2. blowholes
3. skin
4. fins
5. dorsal fin
6. baleen plates
7. throat pleats

Differences:
- Baleen vs. teeth
- Number of blowholes
- Feeding method

Whales vs. Fish:
- Whales breathe air; fish use gills
- Whales are mammals; fish are not
- Whales have lungs; fish have gills

This completes the worksheet! Let me know if you'd like a printable version or visual annotations.