Class 4 science, Matter And Its States

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Class 4 science, 
Matter And Its States
Matter And Its states Mcq

1.A matter has
(a) Shape
(b) has
(c) weight✓
(d) all of these

2.Which state of matter has definite shape size and volume?
(a) solid✓
(b)liquid
(c)gas
(d)all the three

3.A liquid has
a) definite
b) definite volume✓
(c) both
d) none of these

4.in this state are matter the molecules are very loosely packed.
a) solid 
b) liquid
c) gas ✓
d) none of these

5. Water may exist in this state.
a) liquid
b) gas
c) solid
d) All the three✓

6. The process of solid changing into liquid is called ?
a) freezing
b) condensation
c) melting✓
d) evaporation

7. The solid which dissolves in liquid .
a) solvent
b) solute✓
c) solution
d) known of these

8. This is universal solvent 
a) sugar
b) water✓
c) salt
d) ice
Fill in the blanks with the words taking from the box 
( force, gas, liquid, vapour, molecules, solution, volume, solid )

(1) Matter is made of molecules.
 
(ii) In solid. molecules are very closely packed.

(ii) If force is applied, solid can change its shape.

(iv) The volume of a liquid is fixed. 

(v) Gas can freely move in any direction.

(vi) When heated, water changes into vapour.

(vii) Cooling of gas turns it into liquid state.
Match the correct Answer
matter -   furniture
liquid   -   molecules not very closely packed
melting   - loosening up of molecules
gas      -     free molecules
soloute -     sugar
Very short answer type questions.
 
(1) What is matter made of?
Ans -  Matter is made of very small particals called molecules.

(ii) How are molecules of a solid packed? 
Ans-  The molecules of a solid are very closely packed. They have no space between them to move.

(iii) What happens when a liquid is cooked?
Ans-  When liquid is cooked or heated it becomes water vapour and this is gaseous state.

(iv) What is solvent?
Ans -The liquid in which the solute dissolves is called the solvent .
(v) What is universal solvent?
Ans-  Water is universal solvent.

B. Short answer type questions.

(i) What do you mean by matter?
Ans- Matter is made of very small particals called molecules.

 ii)  What are the three states of matter? Write with two examples of each.
Ans- There are three states of matter -Solid , liquid, and gas for example Ice and water.

(iii) Write how are the three states of matter interchangeable?
Ans- The three states of matter are interchangeable. Water exists in its liquid state. When it is cooled, it becomes ice and this is its solid state. Similarly when water is heated, it becomes water vapour and this is its gaseous state.


Long answer type questions.

(1) Why is a liquid also called a fluid?
Ans- Liquids can flow and take the shape of the container in which they are poured in That is why liquids are also called fluids

(ii) What is condensation? Explain.?
Ans-  The process of a gas changing  into liquid state is called condensation

(iii) Explain solubility with suitable examples.
The property of a substance to get dissolves in a  its solubility . For example sugar

(iv) Why is water known as the universal solvent? Answer with example?
Ans :- Water  is known as the . Universal solvent as it can dissolve a large variety of substances in it.

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