An educational slide outlining the learning objectives for a lesson on the three states of matter: solids, liquids, and gases.

It looks like you've uploaded an image of a classroom worksheet titled "Matter and its properties", dated Monday, 12 September. The task focuses on understanding the three states of matter — solid, liquid, and gas — and their physical properties.

Although the full content of the worksheet isn't completely visible in your image (some text is cut off), I can help you solve the problem and explain the solution based on the visible parts and standard science curriculum content.

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🔍 Task Breakdown:

The worksheet asks you to:

1. Recall the three states of matter
2. Sort simple materials into solids, liquids, and gases by observing their physical properties
3. Explain which properties are associated with each state of matter
4. Justify your classification of a material based on its properties

Let’s go through each step with explanations.

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✔ Step 1: Recall the Three States of Matter

The three main states of matter are:

- Solid
- Liquid
- Gas

These states differ in how tightly particles are packed and how they move.

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✔ Step 2: Physical Properties Associated with Each State

| State | Key Physical Properties |
|--------|-------------------------|
| Solid | - Definite shape <br> - Definite volume <br> - Particles are tightly packed <br> - Particles vibrate in place <br> - Cannot flow easily |
| Liquid | - No definite shape (takes shape of container) <br> - Definite volume <br> - Particles are close but can move past each other <br> - Can flow |
| Gas | - No definite shape or volume <br> - Expands to fill container <br> - Particles are far apart and move freely <br> - Compressible |

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✔ Step 3: Sort Materials Based on Properties

Let’s assume some common examples (since the image doesn’t list them):

| Material | State | Reasoning |
|----------------|----------|---------|
| Water | Liquid | Flows, takes shape of container, has fixed volume |
| Ice | Solid | Fixed shape and volume, rigid |
| Oxygen | Gas | Invisible, expands to fill space, no fixed shape |
| Milk | Liquid | Pourable, flows, maintains volume |
| Wooden block | Solid | Keeps shape, rigid, does not flow |
| Air | Gas | Not visible, fills room, compressible |

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✔ Step 4: Justify Classification Based on Properties

Example: Why is water classified as a liquid?

> Water is classified as a liquid because it has a definite volume but no definite shape — it takes the shape of its container. It flows and can be poured. Its particles are close together but able to slide past one another, allowing movement.

Example: Why is ice a solid?

> Ice is a solid because it has both a definite shape and definite volume. It is rigid and does not flow. The particles are locked in place, vibrating but not moving freely.

Example: Why is air a gas?

> Air is a gas because it has no fixed shape or volume and will expand to fill any container. It is compressible and made of particles that are far apart and move rapidly in all directions.

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📌 Summary Answer for Worksheet

> The three states of matter are solid, liquid, and gas.
>
> - Solids have a fixed shape and volume due to tightly packed particles.
> - Liquids have a fixed volume but take the shape of their container; particles can move past each other.
> - Gases have no fixed shape or volume; they expand to fill containers, and particles are far apart and move freely.
>
> Materials can be classified by observing whether they maintain shape (solid), flow (liquid), or expand to fill space (gas). For example, water is a liquid because it flows and takes the shape of its container but does not expand indefinitely.

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✔ Final Tip:

When answering questions like this, always link observations to properties. Use the keywords: shape, volume, flow, particle arrangement.

Let me know if you'd like a printable version or want to add specific materials from your worksheet!