Grade 4 NS - Change of State • Teacha! - Free Printable

The image you've uploaded is a worksheet about changes of state in matter. It includes a table explaining the processes involved when matter changes from one state (solid, liquid, gas) to another through heating or cooling. Below that, there are visual examples with arrows showing transitions between states, and students are asked to name the change of state for each.

Let’s go through the solution step by step and explain it clearly.

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🔹 Part 1: Understanding the Table

The table explains the change of state, whether it involves heating or cooling, and what we call the process:

| Change of State | Heating or Cooling? | Process Name |
|------------------------|---------------------|----------------------|
| Solid → Liquid | Heating | Melting |
| Liquid → Gas | Heating | Evaporation |
| Gas → Liquid | Cooling | Condensation |
| Liquid → Solid | Cooling | Freezing / Solidifying |

This is foundational knowledge. Let's now analyze the images below.

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🔹 Part 2: Analyze Each Visual Example

We'll examine each row with pictures and determine the correct change of state.

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#### 1. Ice cream melting
- Left: Solid (ice cream)
- Right: Liquid (melting ice cream)
- Change: Solid → Liquid
- Process: Melting
✔ Correctly labeled as Melting

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#### 2. Water boiling in a kettle
- Left: Liquid (water in kettle)
- Right: Gas (steam rising)
- Change: Liquid → Gas
- Process: Evaporation (or boiling, which is rapid evaporation)
✔ Correctly labeled as Evaporating

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#### 3. Jam turning into a solid (like jelly)
- Left: Liquid (jam)
- Right: Solid (set jam/jelly)
- Change: Liquid → Solid
- Process: Freezing / Solidifying
✔ Correctly labeled as Freezing/Solidifying

> Note: This might not involve freezing like water, but it's still a physical change where a liquid turns into a semi-solid or solid due to cooling or chemical setting. In science terms, this is often called solidifying.

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#### 4. Clouds forming rain
- Left: Gas (water vapor in clouds)
- Right: Liquid (raindrops)
- Change: Gas → Liquid
- Process: Condensation
✔ Correctly labeled as Condensing

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#### 5. Water turning into ice
- Left: Liquid (water)
- Right: Solid (ice cube)
- Change: Liquid → Solid
- Process: Freezing / Solidifying
✔ Correctly labeled as Freezing/Solidifying

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✔ Final Answer Summary:

All the labels in the worksheet are correct!

Here’s the breakdown:

| Image Description | Change of State | Process Named |
|-------------------------------|---------------------|-----------------------------|
| Ice cream → melted | Solid → Liquid | Melting |
| Kettle → steam | Liquid → Gas | Evaporating |
| Jam → jelly | Liquid → Solid | Freezing/Solidifying |
| Cloud → rain | Gas → Liquid | Condensing |
| Water → ice cube | Liquid → Solid | Freezing/Solidifying |

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📝 Explanation:

- Melting: Adding heat to a solid makes it a liquid.
- Evaporation: Adding heat to a liquid turns it into a gas.
- Condensation: Removing heat from a gas turns it into a liquid.
- Freezing/Solidifying: Removing heat from a liquid turns it into a solid.

These changes are physical changes — the substance remains the same chemically, only its state changes.

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✔ Conclusion:

The worksheet has been completed correctly. All answers match the scientific principles of changes of state. Great job! 😊

Let me know if you'd like a printable version or want to create more practice questions!