Free Printable States of Matter Class 3 Worksheet for Teachers and ... - Free Printable

Let's solve each part of this "States of Matter" worksheet step by step and provide clear explanations.

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1. Choose the correct answer.

A. Solid butter changes to liquid butter on.
- Answer: b. heating
✔ Explanation: When you apply heat to solid butter, it melts and becomes liquid. This process is called melting, which happens due to heating.

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B. Matter exists in three forms: gas, solid and:
- Answer: c. liquid
✔ Explanation: The three main states of matter are solid, liquid, and gas. So the missing one is liquid.

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C. A change of vapour into a liquid on cooling is called.
- Answer: d. condensation
✔ Explanation: When water vapor (gas) cools down and turns into liquid (like dew or rain), it's called condensation.

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2. Identify the picture and write the state of matter in the space provided.

Let’s go through each image:

1. Orange drink with lemon and straw → This is a liquid.
✔ Answer: Liquid

2. Stacked stones (rocks) → These are solids.
✔ Answer: Solid

3. Wooden chair → Made of wood, so it's a solid.
✔ Answer: Solid

4. Balloon filled with air → Air inside balloons is gas.
✔ Answer: Gas

5. Red LPG cylinder → LPG (Liquefied Petroleum Gas) is stored as a liquid under pressure, but it's used as a gas. However, since it's in a cylinder and labeled "LPG", we consider its stored state as liquid. But typically, students learn that gases can be compressed into liquids.
➤ In basic science, LPG is stored as a liquid, so:
✔ Answer: Liquid

> ⚠️ Note: Though LPG is a gas at room temperature, it is liquefied under pressure for storage. For grade III level, the expected answer is Liquid.

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3. Fill in the blanks.

a. ______ do not have fixed shapes. They take the shape of the container.
✔ Answer: Liquids
➡️ Explanation: Liquids flow and take the shape of their container, unlike solids.

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b. States of matter can be interchanged by _____ or _____.
✔ Answer: heating or cooling
➡️ Explanation: Changing temperature (heating or cooling) causes changes in state — like melting, freezing, evaporation, condensation.

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c. Solids have a _____ shape.
✔ Answer: fixed
➡️ Explanation: Solids maintain their shape and volume unless force is applied.

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4. Define.

*(Only partially visible, but likely asking to define terms like solid, liquid, gas, etc.)*

Since only a small portion is visible, here are possible definitions:

- Solid: A state of matter that has a fixed shape and volume.
- Liquid: A state of matter that flows and takes the shape of its container but has a fixed volume.
- Gas: A state of matter that has no fixed shape or volume and expands to fill its container.

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✔ Final Answers Summary:

#### 1. Multiple Choice
- A: b. heating
- B: c. liquid
- C: d. condensation

#### 2. Picture Identification
1. Drink → Liquid
2. Stones → Solid
3. Chair → Solid
4. Balloons → Gas
5. LPG Cylinder → Liquid

#### 3. Fill in the Blanks
a. Liquids
b. heating or cooling
c. fixed

#### 4. Define *(Example answers)*
- Solid: A substance that keeps its shape and size.
- Liquid: A substance that flows and takes the shape of its container.
- Gas: A substance that spreads out and fills the container.

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