Tamil Nadu Board of Secondary EducationSSLC (English Medium) (5 to 8) Class 6

Air is not compressible. - Science

True or False

Air is not compressible.


  • True

  • False



Air is not compressible- False.

correct statement

Air is highly compressible.

  Is there an error in this question or solution?
Chapter 3: Matter around Us - Evaluation [Page 51]


Tamil Nadu Board Samacheer Kalvi Class 6th Science Term 1 Answers Guide
Chapter 3 Matter around Us
Evaluation | Q III. 1. | Page 51


Which of the following are matter?

Chair, air, love, smell, hate, almonds, thought, cold, cold drink, smell of perfume.

What are the characteristics of particles of matter?

Give reasons:

Solids cannot be compressed.

Fill in the blank:

The temperature at which a liquid starts changing into its vapour state is ______.

Classify the following into solids, liquids and gases.
Oxygen, milk, common salt, wax, stone, water vapour, carbon-dioxide, sugar, mercury, coal, blood, butter, copper, coconut oil, kerosene.

 Name the three states of matter and define them.

 Give reason:
When an empty gas jar is inverted over a gas jar containing a coloured gas, the gas also spreads into the empty jar.

Give reason:
A red ink drop added to small amount of water in a glass turns water red in some time.

Fill in the blank:

Liquids have a definite ............

Write whether the following statement is true or false.
Only water can exist in three different states.

Write true or false for statement. Rewrite the false statement correctly.

Solids can be compressed easily.

Name the phenomenon which cause the following change:

Formation of water vapour from water.

If an object weighs 6 kg on earth. What will be its weight on moon ?

What happens when a solid is heated ?

Why liquids do not have a definite shape ?

Give reason Gases can be compressed easily .

Give reason

When an empty gas jar is inverted over a gas jar containing a coloured gas, the gas also spreads into the empty jar.

Give an experiment to explain that there are intermolecular spaces between water molecules.

Fill in the blank

Molecules in a ________ are packed very closely.

The state of matter which has no definite shape or volume is called

When sugar is dissolved in water, there is no increase in the volume. Which characteristic of matter is illustrated by this observation?

What is the general name of :

  1. rigid form of matter ?
  2. fluid forms of matter ?

State two characteristics of matter demonstrated by diffusion.

Explain why, we can easily move our hand in air but to do the same through a plank of wood, we need a karate expert.

Which one of the following statement is correct in respect of fluids?

Which of the following statement is incorrect?

When a beam of sunlight enters a room through a window, we can see tiny particles X suspended in a gas (or rather a mixture of gases) Y which are moving rapidly in a very haphazard manner.

  1. What could particles X be ?
  2. Name the gas (or mixture of gases) Y.
  3. What is the phenomenon exhibited by particles X known as ?
  4. What is causing the movement of particles X ?
  5. What conclusion does the existence of this phenomenon give us about the nature of matter ?

Define: diffusion

 Define: interconversion of states of matter.

What are the two conditions for the interconversion of states of matter?

Give reasons for the following:

Solids have a definite shape and are highly rigid while gases have to definite shape and are least rigid.

Give reasons for the following:

Sugar can be distinguished from talcum powder using water.

Give reasons for the following:

Water on freezing turns into ice.

Give reasons for the following:

A bottle of perfume on opening evolves an odour which can be sensed over a long distance.

Complete the statement given below by selecting the correct word.

The space between atoms in gases is maximum while in ____ is minimum,

Fill in the blank with the correct word Given below.

The space between atoms’ [molecules] of solids is ____

Name the three states of matter.

Fill in the blank:

Particles in a gas possess ___________ kinetic energy.

200 ml of water is poured into a bowl of 400 ml capacity. The volume of water will be ______.

Among the following ______ is not a mixture.

Water obtained from tube wells is usually ______ water.

Match the following.

Property Example
Breaks easily (Brittle) Metal pan
Bends readily Rubber band
Can be stretched easily Cotton wool
Gets compressed easily Mud pot
Gets heated readily Plastic wire

Mr. Raghu returns home on a hot summer day and wants to have buttermilk. Mrs. Raghu has the only curd. What can she do to get buttermilk? Explain

In a glass containing some water, tamarind juice and sugar are added and stirred well. Is this a mixture? Can you tell why? Will this solution be sweet or sour or both sweet and sour?

Which one of the following element name is not derived from planet?

The Cow and Birds are nonliving things.

Mention any two characteristics of the particles of matter.

The property to flow is unique to fluids. Which one of the following statements is correct?


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