Changing States of Matter Worksheet with labeled diagram and true/false questions.

Problem Analysis:

The worksheet involves two main tasks:
1. Labeling the diagram showing the changing states of matter using the provided words: freezing, condensation, evaporation, and melting.
2. Determining the truthfulness of statements about changes in the states of matter.

Let's solve each part step by step.

---

Q.1: Labeling the Diagram

The diagram shows three states of matter: solid, liquid, and gas. Arrows indicate the transitions between these states. We need to label the arrows with the appropriate terms from the given list: freezing, condensation, evaporation, and melting.

#### States of Matter:
- Solid: Ice (solid water)
- Liquid: Water (liquid water)
- Gas: Water vapor (gaseous water)

#### Transitions Between States:
1. From Solid to Liquid: This is called melting.
2. From Liquid to Gas: This is called evaporation.
3. From Gas to Liquid: This is called condensation.
4. From Liquid to Solid: This is called freezing.

#### Filling in the Labels:
- The arrow from solid (ice) to liquid (water) is labeled melting.
- The arrow from liquid (water) to gas (water vapor) is labeled evaporation.
- The arrow from gas (water vapor) to liquid (water) is labeled condensation.
- The arrow from liquid (water) to solid (ice) is labeled freezing.

#### Final Labeled Diagram:
```
gas
|
v
______|______
| |
v v
solid <-- freezing --> liquid <-- condensation -->
^ ^
| |
melting |
|
evaporation
```

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Q.2: True or False Statements

We need to evaluate each statement based on the principles of changes in the states of matter.

#### Statement 1:
> The temperature at which a solid melts is called its freezing point.

- Explanation: The temperature at which a solid melts is called its melting point, not its freezing point. The freezing point is the temperature at which a liquid freezes into a solid.
- Answer: False (F)

#### Statement 2:
> Changes in state are reversible and can be made by adding or removing heat.

- Explanation: Changes in state (e.g., melting, freezing, evaporation, condensation) are indeed reversible processes. Adding heat causes a substance to change from a solid to a liquid to a gas, while removing heat causes it to change from a gas to a liquid to a solid.
- Answer: True (T)

#### Statement 3:
> The melting and freezing points of a material are the same temperature.

- Explanation: For a pure substance, the melting point (the temperature at which a solid turns into a liquid) and the freezing point (the temperature at which a liquid turns into a solid) are the same. This is because they represent the same phase transition but in opposite directions.
- Answer: True (T)

#### Statement 4:
> At higher temperatures, particles in an object move slower.

- Explanation: At higher temperatures, particles in a substance gain more energy and move faster. Conversely, at lower temperatures, particles move slower.
- Answer: False (F)

#### Statement 5:
> Ice, liquid water, and water vapor are three different states of water.

- Explanation: Ice (solid), liquid water (liquid), and water vapor (gas) are indeed three different states of matter for water. These states differ in the arrangement and motion of water molecules.
- Answer: True (T)

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Final Answers:

#### Q.1: Labels for the Diagram
- Solid to Liquid: melting
- Liquid to Gas: evaporation
- Gas to Liquid: condensation
- Liquid to Solid: freezing

#### Q.2: True or False Statements
1. False (F)
2. True (T)
3. True (T)
4. False (F)
5. True (T)

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Boxed Final Answer:

\[
\boxed{
\text{Q.1: melting, evaporation, condensation, freezing}
}
\]
\[
\boxed{
\text{Q.2: F, T, T, F, T}
}
\]