Phase Change Worksheet: Matching phase changes to their descriptions and identifying phase changes in real-life examples.

Phase Change Worksheet Solution

#### Part 1: Match the phase change to its description.

We need to match each phase change term with its corresponding description. Here are the correct matches:

1. MELTING
- Description: Change from solid to liquid
- Explanation: Melting is the process where a solid changes into a liquid due to an increase in temperature.

2. FREEZING
- Description: Change from liquid to solid
- Explanation: Freezing is the process where a liquid changes into a solid due to a decrease in temperature.

3. EVAPORATION
- Description: Change from liquid to gas
- Explanation: Evaporation is the process where a liquid changes into a gas (vapor) at temperatures below its boiling point.

4. CONDENSATION
- Description: Change from gas to liquid
- Explanation: Condensation is the process where a gas changes into a liquid due to a decrease in temperature or an increase in pressure.

5. SUBLIMATION
- Description: Change from solid to gas
- Explanation: Sublimation is the process where a solid changes directly into a gas without passing through the liquid phase.

6. DEPOSITION
- Description: Change from gas to solid
- Explanation: Deposition is the process where a gas changes directly into a solid without passing through the liquid phase.

#### Part 2: Write the correct phase change occurred in each example.

We need to identify the phase change that occurred in each given scenario.

1. The moth balls inside my cabinet disappeared without a trace.
- Phase Change: Sublimation
- Explanation: Mothballs are solid naphthalene or paradichlorobenzene, which can sublimate (change directly from solid to gas) when exposed to air over time.

2. The chocolate in my palm turned to liquid after some time.
- Phase Change: Melting
- Explanation: The chocolate, which is initially solid, melts (changes to liquid) due to the heat from your hand.

3. The juice solidify after I placed it in the fridge.
- Phase Change: Freezing
- Explanation: The juice, which is initially liquid, freezes (changes to solid) when cooled in the fridge.

4. Frost formed on the surface of a leaf because of the cold weather.
- Phase Change: Deposition
- Explanation: Frost forms when water vapor in the air changes directly into ice crystals on the leaf surface due to very low temperatures.

5. The pond dries out during summer time.
- Phase Change: Evaporation
- Explanation: The water in the pond evaporates (changes from liquid to gas) due to the high temperatures during summer.

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Final Answer:

#### Part 1:
- MELTING → Change from solid to liquid
- FREEZING → Change from liquid to solid
- EVAPORATION → Change from liquid to gas
- CONDENSATION → Change from gas to liquid
- SUBLIMATION → Change from solid to gas
- DEPOSITION → Change from gas to solid

#### Part 2:
1. Sublimation
2. Melting
3. Freezing
4. Deposition
5. Evaporation

Boxed Final Answer:
\[
\boxed{
\begin{array}{ll}
\text{Part 1:} & \\
\text{MELTING} & \text{Change from solid to liquid} \\
\text{FREEZING} & \text{Change from liquid to solid} \\
\text{EVAPORATION} & \text{Change from liquid to gas} \\
\text{CONDENSATION} & \text{Change from gas to liquid} \\
\text{SUBLIMATION} & \text{Change from solid to gas} \\
\text{DEPOSITION} & \text{Change from gas to solid} \\
\\
\text{Part 2:} & \\
1. & \text{Sublimation} \\
2. & \text{Melting} \\
3. & \text{Freezing} \\
4. & \text{Deposition} \\
5. & \text{Evaporation} \\
\end{array}
}
\]