Educational worksheet on phase changes with questions and a diagram showing transitions between solid, liquid, and gas.

Problem Analysis:

The task involves understanding and identifying phase changes in matter. Phase changes occur when a substance transitions from one state of matter (solid, liquid, gas) to another due to changes in temperature or pressure. The key phase changes are:

1. Melting: Solid → Liquid
2. Freezing: Liquid → Solid
3. Boiling: Liquid → Gas
4. Condensation: Gas → Liquid
5. Sublimation: Solid → Gas
6. Deposition: Gas → Solid

The questions provided in the image require matching these phase changes with their definitions or scenarios.

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Solution Explanation:

#### Section 1: Multiple Choice Questions
1. The phase change from a solid to a liquid is called:
- Answer: Melting
- Explanation: When a solid absorbs heat and turns into a liquid, it undergoes melting.

2. The phase change from a liquid to a gas is called:
- Answer: Boiling
- Explanation: When a liquid gains enough energy (heat) to turn into a gas, it boils.

3. When a cup of liquid water is cooled and turned into a solid, it is called:
- Answer: Freezing
- Explanation: Cooling liquid water causes it to lose energy and transition into a solid state, which is freezing.

4. The phase change from a solid directly to a gas is called:
- Answer: Sublimation
- Explanation: Sublimation occurs when a solid bypasses the liquid phase and directly turns into a gas.

5. You have a pot of water. You boil it until it turns into water vapor (gas). This is:
- Answer: Boiling
- Explanation: Boiling is the process by which a liquid (water) turns into a gas (water vapor).

6. The phase change from gas to a liquid is called:
- Answer: Condensation
- Explanation: When a gas loses energy and turns into a liquid, it condenses.

7. If you freeze water, the particles in it slow down. What phase change occurs?
- Answer: Freezing
- Explanation: Freezing is the process where particles in a liquid slow down due to loss of energy, causing the liquid to become a solid.

8. In which phase change does energy decrease?
- Answer: Freezing
- Explanation: During freezing, the liquid loses energy as it cools and transforms into a solid.

9. Which phase change occurs when you heat the ice cube?
- Answer: Melting
- Explanation: Heating an ice cube causes it to absorb energy and melt into liquid water.

10. Gas in the air cooks as it touches a cold grill, and turns into liquid. This is:
- Answer: Condensation
- Explanation: When gas comes into contact with a cold surface, it loses energy and condenses into a liquid.

11. Energy is slowly removed from a liquid. Which phase change occurs?
- Answer: Freezing
- Explanation: Removing energy from a liquid causes it to cool and eventually freeze into a solid.

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#### Section 2: Arrows and Phase Changes
The second part of the task involves labeling arrows between states of matter with the appropriate phase change. Here’s how to approach it:

- Solid → Liquid: Melting
- Liquid → Solid: Freezing
- Liquid → Gas: Boiling
- Gas → Liquid: Condensation
- Solid → Gas: Sublimation
- Gas → Solid: Deposition

For example:
- If an arrow points from "Solid" to "Liquid," label it as "Melting."
- If an arrow points from "Liquid" to "Gas," label it as "Boiling."

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Final Answer:

1. Melting
2. Boiling
3. Freezing
4. Sublimation
5. Boiling
6. Condensation
7. Freezing
8. Freezing
9. Melting
10. Condensation
11. Freezing

Boxed Final Answer:
\[
\boxed{\text{Melting, Boiling, Freezing, Sublimation, Boiling, Condensation, Freezing, Freezing, Melting, Condensation, Freezing}}
\]