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

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

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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



Mrs. Raghu has to take half a cup of curd, add half a cup of water to it, and mix well. Now, she can serve buttermilk.

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Chapter 3: Matter around Us - Evaluation [Page 52]


Tamil Nadu Board Samacheer Kalvi Class 6th Science Term 1 Answers Guide
Chapter 3 Matter around Us
Evaluation | Q VII. 7. | Page 52


Which of the following are matter?

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

A diver is able to cut through water in a swimming pool. Which property of matter does this observation show?

Fill in the blank:

The change of a solid into a liquid is called melting or................

Fill in the blank: 

The process in which a solid directly changes into a gas is called ....................

Give two example of the following:

The substances which do not change their state on heating.

Why can a piece of chalk be broken easily into smaller pieces while a coal piece cannot be broken easily?

Fill in the blank:

..............can flow

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

Write whether the following statement is true or false.
A gas has no free surface.

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

Solids can be compressed easily.

For the following statement, say whether it describes a solid, a liquid or a gas.
 Particles move about very quickly.

 There are large intermolecular gaps in

  1. water
  2. iron ball
  3. common salt
  4. air

Give reason  of When a teaspoon of sugar is added to half a glass of water and stirred, the water level in the glass does not rise.

Fill in the blank

The physical state of a substance, which has a fixed volume but no fixed shape is _______

Fill in the blank

Molecules in a ________ are packed very closely.

A solid is a state of matter that has

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

Even two or three crystals of potassium permanganate can impart colour to a very large volume of water. Which characteristic of particles of matter is illustrated by this observation?

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.

What is meant by 'diffusion'? Give one example of diffusion in gases.

In which of the following conditions, the distance between the molecules of hydrogen gas would increase?

  1. increasing pressure on hydrogen contained in a closed container
  2. some hydrogen gas leaking out of the container
  3. increasing the volume of the container of hydrogen gas
  4. adding more hydrogen gas to the container without increasing the volume of the container

Bromine particles are almost twice as heavy as chlorine particles. Which gas will diffuse faster; bromine (vapour) or chlorine? Explain your answer.

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 ____

On what basis are the three states classified of matter.

State in which of the three states of matter:

The space between the particles is minimum.

Give a reason why solids and liquids co-exist at their melting points.

Fill in the blanks:

Matter is defined as anything that occupies _______ and has _______

Fill in the blank:

Particles in a gas possess ___________ kinetic energy.

Fill in the blank:

The intermolecular force of attraction is ___________ in solids.

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.

Air is not compressible.

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

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?

You are provided with a mixture of naphthalene and ammonium chloride by your teacher. Suggest an activity to separate them with well labelled diagram.


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