States of Matter Questions and Answers for Class 5

States of Matter Questions and Answers for Class 5 Students

Matter and its States

Hello Class 5 students, by this Article "States of Matter - Questions and Answers" we will explore the fundamental forms substances can take: solid, liquid, and gas. Through engaging questions and answers, they unravel the mysteries of how materials change from one state to another, making science an exciting journey of discovery in their early education.

Definition of Matter:

Everything that surrounds us and sensible by us, is called matter. Matter may be living on non-living things. We can say as "Substances that have weight and occupy space are called matter."

There are three states of matter.
1) Solid, 2) Liquids, 3) Gaseous
* Plasma is an another state of matter
Solid state of matter have its own shape and volume.
Definition of weight:

Weight is a type of force by which everything will attract by earth towards its centre.

Volume means - The space that is occupied by any substance.
The space that is occupied by the matter is called its volume. It is measured by the unit M3.
Definition of mass

Amount of substance that a matter contain, is called mass. It is measured by the unit Kilogram (Kg) gram(gm).

Keep in Mind -
➤Always molecules are moving and they occupy There Some Space.
➤Smallest unit of any type of matter is Atom.
➤Three subatomic particles are found
Proton (P) -` Ernest Rutherford
Newtron (N) - James Chadwick
Electron (E) - J. J. Thomson [nucleus]

Protons and neutrons are situated at a single region called as 'Nucleus' and electrons are revolving in a circular path.

Gas and Vapour => Gas and vapour both are in gaseous state, but increase of vapour, the original state is liquid while in case of gas original state is solid.
[Ex- When sulfur burn sulfur gas is produce but when water heated water vapour is formed.]

Key Words

1. Volume : The amount of space that an object or substance occupies.
2. Diffusion : The process of spreading in all directions.
3. Inter-molecular force : The force existing in between the molecules of a substance.
4. Inter-molecular space : The space existing in between the molecules of a substance.

Points to Remember

Any substance that occupies space and has weight is called matter.
There are three states of matter-solids, liquids and gases.
Molecules are the building units of matter.
Molecules are made up of one or more atoms.
Matter can be changed from one state to another.
Solution is a uniform mixture of a solute and solvent.

Fill in the blanks:

1. Things are made up of matter.
2. Liquids flow from higher to lower level.
3. In gaseous state, the inter-molecular force is the least.
4. The shape of the solid is definite.
5. Liquids can change their shape.
6. The space in between the molecules of a substance is called inter-molecular space.

Write "T' for true and 'F' for false statements:

1. Matter is found in two states. [F]
2. Liquids take the form of the container in which they are put. [T]
3. The molecules of gas are loosely packed. [T]
4. Solution is a uniform mixture of solute and solvent. [T]
5. Water is a solid. [F]
6. Molecules are made up of atoms. [T]

Write one word for each of the following:

1. Conversion of liquid into solid. - Freezing
2. Conversion of gas into liquid. - Condensation
3. Conversion of solid into liquid. - Melting
4. Conversion of liquid into gas. - Evaporation

Answer the following questions:

What do you mean by matter?

Anything that has its own mass and occupies space is called matter.

Name the three states of matter.

The three states of matter are - Solid, Liquid and Gas

Define the following:

(i) Solid : The state of matter which has a shape and also has a volume is called solid.

(ii) Liquid : The state of matter which does not have a particular shape but has a volume is called liquid.

(iii) Gas : The state of matter which doesn't has a particular shape and volume also.

Why are solids hard to touch?

The solids are hard to touch because molecules of solids are very closely packed.

What do you understand by diffusion?

Spreading molecules in all directions spontaneously is called diffusion.

What is a solution? Define with the help of an example.

Solution is a uniform / homogeneous mixture of solute and solvent.

Ex : In a sugar-water solution, sugar is solute and water is solvent.

Write the properties of liquids and differentiate them with that of gasses.

Liquids	Gas
Liquids have a definite volume but no definite shape.	Gases have neither a definite shape nor a definite volume.
The molecules of liquids are not closely packed.	The molecules of gases are very loosely packed.
Liquids can flow from higher level to lower level.	Gases can flow in all directions.

Differentiate between solute and solvent.

Solute	Solvent
The substance that dissolves in a solvent is called solute.	The substance in which a solute dissolves
Solute is present in a solution in less amount.	Solvent is present in a solution in more amount
Solute may be solid, liquid or in gaseous state	Solvent in general found in liquid state
The boiling point is more for solute.	The boiling point is less than salute.

Complete the following table:

	Solid	Liquid	Gas
Shape	Definite	Not definite	Not definite
Volume	Definite	Definite	Not definite
Diffusion	Not diffuse	Not definite	Diffuse

Describe meanings of the word:

Melting - The process in which solid substances change into liquid by heating.
Heating - Temperature increase.
Cooling - Temperature decrease.
Temperature - Temperature is a degree of hotness and coldness.
Melting point -The particular temperature at which a solid substance just starts melting known as melting point. Melting point occurs in solid.
Ex - Melting point of ice is O°C
Melting point of iron is 1540°C
Freezing - The process by which a liquid substance changes into solid by cooling. Freezing occurs in liquid.
Freezing point - The particular temperature at which liquid changes into solid by cooling.

Ex - Freezing point of water is O°C Melting point of ice is O°C which is the same as the freezing point of water. Reverse process of melting is freezing