States of Matter Class 5 0 2020 21 07 113423 | PDF - Free Printable

Let's solve each question in the worksheet "States of Matter" step by step and provide clear explanations.

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1. Fill in the blanks.

a. A solid has a definite shape and definite volume.
✔ *Explanation:* Solids maintain their shape and volume because their particles are tightly packed and vibrate in fixed positions.

b. Anything that has weight and occupies space is called matter.
✔ *Explanation:* This is the definition of matter — it includes solids, liquids, and gases.

c. Matter is made up of small particles called atoms.
✔ *Explanation:* Atoms are the smallest units of matter that retain the chemical properties of an element.

d. The change of paper into ash is an example of chemical change.
✔ *Explanation:* Burning paper produces new substances (ash, smoke, gases), which indicates a chemical change.

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2. Who am I?

a. I am a liquid and soluble in water. → Alcohol
✔ *Explanation:* Alcohol (like ethanol) is a liquid that dissolves easily in water.

b. I condense to form water on cooling. → Water vapor
✔ *Explanation:* Water vapor (gas) turns into liquid water when cooled — this is condensation.

c. I am building blocks of matter. → Atoms
✔ *Explanation:* Atoms are the basic units that make up all matter.

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3. Tick (√) the correct word.

a. Alcohol and glycerine are (immiscible / miscible) liquids.
✔ miscible
*Explanation:* Miscible liquids mix completely in all proportions. Alcohol and glycerine dissolve in each other.

b. Atoms of (different / same) kinds combine and give rise to compounds.
✔ different
*Explanation:* Compounds are formed when atoms of different elements chemically bond together (e.g., H₂O from hydrogen and oxygen).

c. In (solid / liquid) molecules are loosely packed.
✔ liquid
*Explanation:* In solids, molecules are tightly packed; in liquids, they are less tightly packed and can move past one another.

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4. Define.

a. Chemical change:
A change in which new substances are formed due to a chemical reaction. It involves breaking and forming chemical bonds.
*Example:* Rusting of iron, burning of wood.

b. Matter:
Anything that has mass and takes up space. It exists in three main states: solid, liquid, and gas.

c. Physical change:
A change in which the substance’s physical properties (like shape, size, state) change, but no new substance is formed.
*Example:* Melting ice, tearing paper.

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5. Answer the following questions in one or two sentences.

a. What are miscible liquids? Give an example.
👉 Liquids that mix completely in all proportions are called miscible liquids. An example is alcohol and water.

b. Solids have a definite shape and volume. Why?
👉 Solids have a definite shape and volume because their particles are tightly packed and held in fixed positions by strong forces.

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6. Answer the following questions in detail.

#### a. Write the properties of solids, liquids, and gases. With the help of diagram show the arrangement of molecules of all three states.

Properties:

| State | Shape | Volume | Compressibility | Flow | Particle Arrangement |
|--------|---------------|----------------|------------------|------------|------------------------|
| Solid | Definite | Definite | Very low | No | Tightly packed, fixed positions |
| Liquid | Takes container shape | Definite | Low | Yes | Close but can move past each other |
| Gas | Takes container shape | Not definite | High | Yes | Far apart, move freely |

Arrangement of Molecules (Diagram Description):

- Solid: Particles are closely packed in a regular pattern (like a grid). They vibrate in place.
- Liquid: Particles are close but not in fixed positions. They slide over each other.
- Gas: Particles are far apart and move randomly in all directions.

> 📌 *Since we can't draw here, imagine:*
> - Solid: Like marbles stacked neatly in a box.
> - Liquid: Marbles in a container, touching but able to roll around.
> - Gas: Marbles scattered widely in a large room, bouncing off walls.

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#### b. Differentiate between physical and chemical changes.

| Feature | Physical Change | Chemical Change |
|-----------------------|---------------------------------------------|----------------------------------------------|
| New substance formed? | No | Yes |
| Reversible? | Usually reversible | Often irreversible |
| Change in composition?| No – only physical form changes | Yes – new substances are formed |
| Examples | Melting ice, boiling water, dissolving salt | Burning wood, rusting iron, cooking food |
| Energy change | May involve heat or light, but no bonds broken/formed | Involves breaking and forming chemical bonds |

✔ *Key point:* Physical changes affect appearance; chemical changes create new materials with different properties.

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✔ Final Notes:

This worksheet helps students understand:
- The three states of matter
- Properties of matter
- Differences between physical and chemical changes
- Concepts like miscibility and particle behavior

It’s ideal for Grade V students learning foundational science concepts.

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Let me know if you'd like a printable version or a diagram sketch for the molecular arrangements!