"Educational worksheet for children to predict whether various objects will float or sink in water."

Let's solve the "Float or Sink" problem based on the objects listed in the image. The task is to determine whether each object will float (put a green smiley face) or sink (put a red sad face) when placed in water.

We'll analyze each object based on its density and material properties, which affect buoyancy:

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1. Coin

- Made of metal (usually copper, nickel, or steel).
- Metals are denser than water.
- Result: Sinks.
✔ Sink → Place the red sad face.

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2. Pencil

- Made of wood with a graphite core and painted coating.
- Wood is less dense than water, so it usually floats.
- Even though it has a graphite tip, the overall density is still low enough to float.
- Result: Floats.
✔ Float → Place the green smiley face.

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3. Cotton ball

- Made of soft, lightweight cotton fibers.
- Very low density; absorbs water slowly but initially floats.
- Result: Floats.
✔ Float → Place the green smiley face.

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4. Crayon

- Typically made of wax and pigment.
- Wax is less dense than water, so crayons generally float.
- Result: Floats.
✔ Float → Place the green smiley face.

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5. Rubber band

- Made of rubber (elastic polymer).
- Rubber is denser than water, so it tends to sink.
- However, some rubber bands might float if they’re very thin and light.
- But generally, rubber bands sink.
✔ Sink → Place the red sad face.

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6. Wooden stick

- Made of wood.
- Wood is less dense than water.
- Result: Floats.
✔ Float → Place the green smiley face.

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Final Answer Table:

| Objects | Float 🟢 | Sink 🔴 |
|------------------|--------|--------|
| coin | | ✔ |
| pencil | ✔ | |
| cotton ball | ✔ | |
| crayon | ✔ | |
| rubber band | | ✔ |
| wooden stick | ✔ | |

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Summary:

- Float: Pencil, Cotton Ball, Crayon, Wooden Stick
- Sink: Coin, Rubber Band

This activity teaches basic concepts of buoyancy and density — objects less dense than water float, while those more dense sink.