INTERNATIONAL INDIAN SCHOOL- AL JUBAIL
TERM-II [2024-25] CLASS : V
SUBJECT: SCIENCE
L.8: STATES OF MATTER
I. DEFINE THE FOLLOWING:
1. MATTER: Anything that occupies space and has mass is called matter. Matter exists in 3 states – solid, liquid and gas
2. MOLECULE: The tiny particles with which all matter, whether a solid, liquid or gas, are made up of are called molecules.
3. ATOM: The very tiny particles with which molecules are made up of are called atoms. Atoms are the building block of
matter.
4. INTERMOLECULAR SPACE: The space in between the molecules of matter is called intermolecular space. Intermolecular
spaces are less in solids, more in liquids and most in gases.
5. SOLUTION: A homogeneous mixture of a solute in a solvent is called a solution. Ex: Sugar solution, Salt solution, etc.
II NAME THE FOLLOWING:
1.Name the mixture in which the composition is uniform throughout.
Ans: Homogenous mixture
2. Name the matter made up of different kinds of atoms combined in fixed numbers.
Ans: Compound
3. Name the liquid that expands rather than contracting on cooling.
Ans: Water
4.Name the method of spreading the molecules more widely.
Ans: Diffusion
III DIFFERENTIATE BETWEEN THE FOLLOWING:
1. SOLUTE and SOLVENT
Solute Solvent
The solid which dissolves in a The liquid in which a solid dissolve is
liquid is called a solute called a solvent
Eg: Sugar, Salt, etc. Eg: Water
2. PHYSICAL CHANGE AND CHEMICAL CHANGE
Physical Change Chemical change
Temporary change Permanent change
New substances are not formed New substances with entirely new properties are
obtained
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Original substance can be recovered easily Original substance cannot be recovered
Eg: Freezing of water, melting of wax, boiling of Eg: Digestion of food, burning of coal, rusting, etc.
water, etc.
3. ELEMENT AND COMPOUND
Element Compound
1.Any matter which is made up of only one kind of 1.Matter made up of different kinds of atoms
atoms combined in fixed ratio
2. More than 100 elements are present in earth 2.Compounds are infinite
3. Ex: Gold, iron, copper etc.
3.Ex: Water, Salt, glucose etc.
IV QUESTION AND ANSWER:
1. What are the three states of matter? Give examples.
The three states of matter are:
a) Solids - stone, brick, ice
b) Liquid - water, milk, oil
c) Gases - oxygen, nitrogen, carbon dioxide
2. How many types of atoms are there in water and carbon dioxide?
WATER: Each molecule of water contains two atoms of hydrogen and one atom of oxygen (H2O).
CARBON DIOXIDE: Each carbon dioxide molecule contains one atom of carbon and two atoms of oxygen (CO2).
3. How can we get back salt from its solutions? Explain with the help of a diagram.
Aim: To obtain salt from salt solution.
Materials: common salt, China dish, water, Bunsen burner, tripod stand, wire gauze
Dissolve two spoonful of common salt in the China dish half filled with water. Stir with a clean glass rod till the salt
dissolves. Take a drop of the solution and taste it. Now, heat the solution in the china dish over a Bunsen burner till
water evaporates completely. We will be left with the original common salt.
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2. With the help of diagrams show molecular arrangements in solid, liquid and gases.
5. Write any three differences between solids, liquids and gases.
Solid Liquid Gas
Solids have a definite shape and Liquids do not have a definite Gases neither have definite shape
volume. shape, but have definite volume nor volume
The intermolecular forces are The intermolecular forces are The intermolecular forces are
stronger. moderate minimum
The intermolecular space is The intermolecular space is The intermolecular space is
minimum moderate maximum
6. What kind of changes will happen in
a) burning of paper b) burning matchstick
Give Reason.
Ans: In both a and b chemical changes take place.
Reason:
i. In chemical change, new substances are formed with entirely new properties.
ii. It is a permanent change. Original substances can’t be obtained back by simple means.
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IV.GIVE REASON
1. Sometimes in hilly region water pipe bursts during winter season.
During winter season, the water inside the pipe expands as it gets close to freezing. This causes an increase in
pressure inside the pipe. When the pressure gets too high for the pipe to contain, it bursts.
2. Water level doesn’t increase when sugar is added to water.
The level of water does not change when sugar is dissolved in water because the sugar particles occupy the
intermolecular spaces between the water particles. Since, only the empty spaces are occupied the level of water
doesn’t increase.
IN TEXT QUESTIONS (Page No: 78) ANSWERS
1. compound
2. minimum
3. solid
4. solution
TEXT BOOK EXERCISES (PAGE 78,79,80)
SECTION A
1. c
2. a
3. a
4. a
SECTION B
A B
1 b
2 a
3 e
4 c
5 d
SECTION C
1. X
2. X
3. X
4. X
5. X
SECTION F
1. a
2. c
3. c
4. c
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