Educational worksheet illustrating the three states of water and the processes of melting, freezing, evaporation, and condensation.

The worksheet is about the changes in the state of matter of water. Water can exist in three states: solid (ice), liquid (water), and gas (water vapor). The transitions between these states involve specific processes that either absorb or release heat. Let's solve the problem step by step.

Key Processes and Changes:

1. Solid (Ice) → Liquid (Water):
- Process: Melting
- Change: Ice absorbs heat and turns into liquid water.
- Heat: Gains heat

2. Liquid (Water) → Solid (Ice):
- Process: Freezing
- Change: Water loses heat and turns into ice.
- Heat: Loses heat

3. Liquid (Water) → Gas (Water Vapor):
- Process: Evaporation (or Boiling if at 100°C)
- Change: Water absorbs heat and turns into water vapor.
- Heat: Gains heat

4. Gas (Water Vapor) → Liquid (Water):
- Process: Condensation
- Change: Water vapor loses heat and turns into liquid water.
- Heat: Loses heat

Filling in the Worksheet:

#### Left Side (Solid → Liquid):
- Process: Melting
- Change: Ice → Water
- Heat: Gains heat

#### Right Side (Liquid → Gas):
- Process: Evaporation (or Boiling)
- Change: Water → Water Vapor
- Heat: Gains heat

#### Bottom Left (Liquid → Solid):
- Process: Freezing
- Change: Water → Ice
- Heat: Loses heat

#### Bottom Right (Gas → Liquid):
- Process: Condensation
- Change: Water Vapor → Water
- Heat: Loses heat

Final Answer:

```
SOLID (Ice)
Process: Melting
Change: Ice → Water
Heat: Gains heat

LIQUID (Water)
Process: Freezing
Change: Water → Ice
Heat: Loses heat

GAS (Water Vapor)
Process: Evaporation (or Boiling)
Change: Water → Water Vapor
Heat: Gains heat

Process: Condensation
Change: Water Vapor → Water
Heat: Loses heat
```

Explanation:

- Melting: Ice absorbs heat to become liquid water.
- Freezing: Water loses heat to become ice.
- Evaporation/Boiling: Water absorbs heat to become water vapor.
- Condensation: Water vapor loses heat to become liquid water.

This completes the worksheet. Each process is clearly labeled with the name of the process, the change in state, and whether heat is gained or lost.

Final Answer Boxed:
\boxed{
\begin{array}{|c|c|c|}
\hline
\textbf{Process} & \textbf{Change} & \textbf{Heat} \\
\hline
\text{Melting} & \text{Ice → Water} & \text{Gains heat} \\
\hline
\text{Freezing} & \text{Water → Ice} & \text{Loses heat} \\
\hline
\text{Evaporation/Boiling} & \text{Water → Water Vapor} & \text{Gains heat} \\
\hline
\text{Condensation} & \text{Water Vapor → Water} & \text{Loses heat} \\
\hline
\end{array}
}