Educational worksheet illustrating the states of water and phase changes.

It looks like you've uploaded an image of a science worksheet titled "Changing State" that involves filling in the blanks to describe how water changes between its three states: solid (ice), liquid (water), and gas (steam). The task is to choose words from a word bank to complete sentences about the temperature at which these changes occur.

Let’s go through the diagram step-by-step and solve it based on standard scientific knowledge.

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🔹 Diagram Breakdown:

There are four boxes connected by arrows showing phase changes:

1. Steam → Water (Condensation)
2. Water → Ice (Freezing)
3. Ice → Water (Melting)
4. Water → Steam (Evaporation)

Each box has a sentence with blanks to fill in.

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🔹 Word Bank:

The words provided are:
- heat
- melts
- cools
- freezes
- condenses
- evaporates
- 0°C
- 100°C

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✔ Step-by-Step Solution:

#### 1. Steam → Water
> "If you ______ steam to a temperature of ______, it turns into water."

- To change steam (gas) → water (liquid), you need to cool it.
- This process is called condensation, and it happens at 100°C (the boiling point).
- So, when steam is cooled to 100°C, it becomes water.

✔ Answer:
> If you cool steam to a temperature of 100°C, it turns into water.

(Actually, condensation occurs at or below 100°C, but the key transition point is 100°C — this is the temperature where steam begins to condense.)

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#### 2. Water → Ice
> "If you ______ water to a temperature of ______, it turns into ice."

- To change water (liquid) → ice (solid), you need to cool it.
- This process is called freezing, and it happens at 0°C.

✔ Answer:
> If you cool water to a temperature of 0°C, it turns into ice.

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#### 3. Ice → Water
> "If you ______ ice to a temperature of ______, it turns into water."

- To change ice (solid) → water (liquid), you need to heat it.
- This process is called melting, and it happens at 0°C.

✔ Answer:
> If you heat ice to a temperature of 0°C, it turns into water.

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#### 4. Water → Steam
> "If you ______ water to a temperature of ______, it turns into steam."

- To change water (liquid) → steam (gas), you need to heat it.
- This process is called evaporation or boiling, and it happens at 100°C.

✔ Answer:
> If you heat water to a temperature of 100°C, it turns into steam.

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✔ Final Completed Worksheet:

| Box | Sentence |
|-----|---------|
| Steam → Water | If you cool steam to a temperature of 100°C, it turns into water. |
| Water → Ice | If you cool water to a temperature of 0°C, it turns into ice. |
| Ice → Water | If you heat ice to a temperature of 0°C, it turns into water. |
| Water → Steam | If you heat water to a temperature of 100°C, it turns into steam. |

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🧠 Key Concepts Recap:

- Melting: Solid → Liquid (0°C for water)
- Freezing: Liquid → Solid (0°C)
- Evaporation/Boiling: Liquid → Gas (100°C)
- Condensation: Gas → Liquid (100°C)

Note: While evaporation can happen at any temperature, boiling specifically occurs at 100°C under standard pressure.

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Let me know if you'd like this formatted as a printable answer sheet!