States of matter worksheet for Year 4 Science, illustrating molecular structure in solid, liquid, and gas forms.

Problem Description:

The task is to draw a diagram showing the molecules for each state of matter: solid, liquid, and gas. The worksheet provides examples of how molecules are arranged in each state but asks you to create your own diagrams.

Solution Explanation:

#### Understanding the States of Matter:
1. Solid:
- Molecules in a solid are tightly packed together.
- They vibrate in place but do not move freely.
- Solids have a definite shape and volume.

2. Liquid:
- Molecules in a liquid are close together but can move past one another.
- Liquids have a definite volume but take the shape of their container.
- Molecules are more spread out compared to solids.

3. Gas:
- Molecules in a gas are far apart and move freely in all directions.
- Gases have neither a definite shape nor a definite volume.
- Molecules are highly dispersed.

#### Drawing the Diagrams:
To represent these states, we will use simple circles to depict molecules and show their arrangement accordingly.

---

Step-by-Step Solution:

#### 1. Solid:
- Draw molecules as small circles arranged in a regular, ordered pattern.
- The molecules should be very close to each other, indicating strong intermolecular forces.
- Example:
```
O-O-O
| | |
O-O-O
| | |
O-O-O
```

#### 2. Liquid:
- Draw molecules as small circles that are closer together than in a gas but less ordered than in a solid.
- The molecules should be able to move around each other slightly, indicating weaker intermolecular forces than in a solid.
- Example:
```
O-O-O
| |
O-O-O
| |
O-O-O
```

#### 3. Gas:
- Draw molecules as small circles that are widely spaced and scattered.
- The molecules should be far apart from each other, indicating very weak intermolecular forces.
- Example:
```
O O
O
O O
```

---

Final Answer:

Here is how the diagrams should look:

1. Solid:
```
O-O-O
| | |
O-O-O
| | |
O-O-O
```

2. Liquid:
```
O-O-O
| |
O-O-O
| |
O-O-O
```

3. Gas:
```
O O
O
O O
```

Boxed Final Answer:

\boxed{
\begin{array}{ccc}
\text{Solid} & \text{Liquid} & \text{Gas} \\
\hline
O-O-O & O-O-O & O O \\
| | | & | & O \\
O-O-O & O-O-O & O O \\
| | | & | & \\
O-O-O & O-O-O & \\
\end{array}
}