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

States of Matter Worksheet Solution

#### 1. Fill in the blanks
a. A solid has a definite shape and definite volume.
- Explanation: Solids have particles that are closely packed together, giving them a fixed shape and volume.

b. Anything that has weight and occupies space is called matter.
- Explanation: Matter is anything that has mass and takes up space.

c. Matter is made up of small particles called atoms/molecules/particles.
- Explanation: Matter is composed of tiny building blocks such as atoms or molecules.

d. The change of paper into ash is an example of chemical change.
- Explanation: When paper burns and turns into ash, new substances (like carbon dioxide and ash) are formed, which is a chemical change.

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#### 2. Who am I?
a. I am a liquid and soluble in water.
Answer: Water
- Explanation: Water is a liquid and dissolves many substances.

b. I condense to form water on cooling.
Answer: Water vapor
- Explanation: Water vapor cools down and condenses to form liquid water.

c. I am building blocks of matter.
Answer: Atoms/Molecules
- Explanation: Atoms and molecules are the basic building blocks of all matter.

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#### 3. Tick (√) the correct word
a. Alcohol and glycerine are miscible liquids.
- Explanation: Alcohol and glycerine can mix with each other in any proportion, making them miscible.

b. Atoms of different kinds combine and give rise to compounds.
- Explanation: Compounds are formed when atoms of different elements chemically bond together.

c. In liquid molecules are loosely packed.
- Explanation: In liquids, molecules are less tightly packed compared to solids but more packed than gases.

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#### 4. Define
a. Chemical change:
- A chemical change is a process in which one or more substances are transformed into new substances with different chemical properties. Examples include burning, rusting, and cooking.

b. Matter:
- Matter is anything that has mass and occupies space. It exists in three states: solid, liquid, and gas.

c. Physical change:
- A physical change is a change in the state or appearance of a substance without altering its chemical composition. Examples include melting ice, boiling water, and tearing paper.

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#### 5. Answer the following questions in one or two sentences
a. What are miscible liquids? Give an example.
- Miscible liquids are liquids that can mix with each other in any proportion to form a homogeneous mixture. 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 closely packed together and held in fixed positions by strong intermolecular forces. This prevents them from changing shape or volume easily.

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#### 6. Answer the following questions in detail
a. Write the properties of solids, liquids, and gases. With the help of a diagram show the arrangement of molecules of all three states.

- Properties of Solids:
- Fixed shape and volume.
- Particles are closely packed and vibrate in fixed positions.
- High density.
- Low compressibility.

- Properties of Liquids:
- Definite volume but no fixed shape (takes the shape of the container).
- Particles are close together but can move past each other.
- Moderate density.
- Low compressibility.

- Properties of Gases:
- No fixed shape or volume (fills the entire container).
- Particles are far apart and move freely in all directions.
- Low density.
- Highly compressible.

- Diagram of Molecular Arrangement:
- Solid: Particles are closely packed in a fixed, ordered arrangement.
- Liquid: Particles are close together but can slide past each other.
- Gas: Particles are far apart and move randomly in all directions.


b. Differentiate between physical and chemical changes.

- Physical Change:
- Definition: A change in the state or appearance of a substance without altering its chemical composition.
- Characteristics:
- Reversible (can be undone).
- No new substances are formed.
- Energy may be absorbed or released, but the identity of the substance remains the same.
- Examples: Melting ice, boiling water, tearing paper, dissolving sugar in water.

- Chemical Change:
- Definition: A change in which one or more substances are transformed into new substances with different chemical properties.
- Characteristics:
- Irreversible (cannot be undone easily).
- New substances are formed.
- Energy is usually absorbed or released during the reaction.
- Examples: Burning wood, rusting iron, cooking food, digesting food.

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Final Answer Summary:

1. a. Solid
b. Matter
c. Atoms/Molecules/Particles
d. Chemical change

2. a. Water
b. Water vapor
c. Atoms/Molecules

3. a. Miscible
b. Different
c. Liquid

4. Definitions provided above.

5. a. Miscible liquids are liquids that can mix in any proportion; example: alcohol and water.
b. Solids have a definite shape and volume because their particles are closely packed and held in fixed positions.

6. a. Properties and diagram provided above.
b. Physical and chemical changes differentiated as explained above.

Final Answer Boxed:
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