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cbse 6th Standard Science Sorting Materials into Groups Sample Question Papers Study Material - QB365 Set A

Published on: 24/10/2025

Question Set A

cbse 6th Standard Science Sorting Materials into Groups Sample Question Papers Study Material - QB365

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Std: 6th Standard CBSE - Science

chapter: Sorting Materials into Groups - Sample Question Papers

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Questions:

Generic 5

4 x 5 = 20

Differentiate among opaque, translucent and transparent materials, by giving one example of each.

Chalk, iron nail, wood, aluminium, candle, cotton usually look different from each other. Give some properties by which we can prove that these materials are different.

(a) What do you understand by the term 'classification'?
(b) Differentiate between transparent and opaque materials. Give two examples for each.
(c) How can we make a normal paper translucent?

Kavita bought new silver anklets. After a month, she found that the anklets had lost their lustre and turned black. She had doubts that they were not made of pure silver. But her mother told her that they were of pure silver. She washed her silver anklets with lemon juice and found that the silver anklets had get the lustre back.
Read the above passage and answer the following questions.
(a) Do you think that the anklets are not of pure silver?
(b) Why silver anklets lost their lustre after some time?
(c) What values were shown by Kavita's mother?

Multiple Choice Question

5 x 1 = 5

Select the odd one:

(a)

Glass

(b)

Air

(c)

Stone

(d)

Water

The property of a substance that decides whether it will float or sink in water is:

(a)

Volume

(b)

Density

(c)

Refractive index

(d)

Viscosity

Which of the following materials is not soluble in water?

(a)

Salt

(b)

Sand

(c)

Sugar

(d)

Honey

Which of the following does not belong to the group?

(a)

Window pane

(b)

Cellophane sheet

(c)

Mirror

(d)

Air

Which of the following statements is not true?

(a)

Materials are grouped for convenience

(b)

Materials are grouped to study their properties

(c)

Materials are grouped for fun

(d)

Materials are grouped according to their uses

Generic 2

5 x 2 = 10

10.

How is density of an object related to its floating or sinking?

11.

What type of materials float on the surface of water? Give two examples

12.

Define translucent materials. Give an example

13.

Mustard oil and grease both are insoluble in water, but mustard oil floats whereas grease settles down, why?

14.

Name two translucent objects.

Generic 3

5 x 3 = 15

15.

A solid is put in a bucket of water. It floats just below the surface of the water. What do you think is the density of the object in relation to the density of water?

16.

Why is it easier to hold a steel tumbler with cold milk than the one with hot milk ?

17.

You are provided with the following materialsturmeric, honey, mustard oil, water, glucose, rice flour, groundnut oil.
Make any three pairs of substances where one substance is soluble in the other and any three pairs of substances where one substance remains in soluble in the other substance.

18.

How can materials be classified on the basis of physical state?

19.

What do you mean by the hardness of materials? Explain with an example

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Answers Key:

Generic 5

4 x 5 = 20

Opaque, translucent and transparent materials can be differentiated as follows

S.No	Opaque materials	Translucent materials	Transparent materials
(i)	Materials through which things can no be seen are called opaque materials.	Materials through which things can be seen but not clearly are called translucent cent materials	Materials through which things can be seen are called transparent materials.
(ii)	e.g., Card board	e.g., Oily paper	e.g., Glass

There are following properties by which we can prove that these materials are different:

Material	Lustre	Hardness/softness	Roughness/smoothness
Chalk	-	Soft	Rough
Iron nail	Lustrous	Hard	Rough
Wood	-	Hard	Rough
Aluminium	Lustrous	Hard	Smooth
Candle	Candle	Soft	Smooth
Cotton	-	Soft	Smooth

(a) Classification means grouping the things on the basis of their similarities and dissimilarities.
(b)

Transparent materials	Opaque materials
Those materials through which things can be seen are called transparent materials. e.g., glass, water	Those materials through which things cannot be seen are called opaque materials. e.g., wood, cardboard.

c) We can make a normal paper translucent by putting few drops of oil on it.

(a) No, the anklets were made of pure silver.
(b) Silver anklets lost their lustre and appear dull, because of the action of air and moisture on them.
(c) Kavita's mother is knowledgeable and intelligent.

Multiple Choice Question

5 x 1 = 5

(b)
Density

(b)
Sand

(d)
Air

Generic 2

5 x 2 = 10

10.

An object will float if its density is less than the liquid. It will sink if its density is greater than that of the surrounding liquid.

11.

Materials which are lighter 'than water, float on water: Wood and oil are lighter than water and float on it.

12.

The materials through which objects are partially visible, are known as translucent materials, e.g., butter paper

13.

Mustard oil is lighter than water hence it floats, while grease is heavier thus sinks.

14.

Butter paper and oiled paper are two examples of translucent objects

Generic 3

5 x 3 = 15

15.

Solid floats just below the surface of water and it neither sinks nor floats on water due to almost same density of the solid and water.

16.

It is easier to hold a steel tumbler with cold milk than the one with hot milk because steel is a good conductor of heat and steel tumbler becomes hot due to hot milk and it can burn our hands

17.

Substances which are soluble in the other substance are :
(a) Honey in water
(b) Glucose in water
(c) Groundnut oil in mustard oil
Substances which are insoluble in the other substance are:
(a) Turmeric in water
(b) Rice flour in water
(c) Mustard oil in water

18.

Materials can be classified into three groups on the basis of physical state:
Solids: They have definite shape and volume, e.g., iron, ice, etc.
Liquids : They have definite volume but do not have definite shape, e.g., water.
Gases : They do not have definite shape and volume, e.g., air

19.

Hardness is the property of materials that can be found out by pressing the materials. A material may be soft or hard.
Soft materials : The materials which can be compressed easily are known as soft materials.e.g.,-cotton, sponge, etc.
Hard materials: The materials that are difficult to compress are known as hard materials. e.g., - iron, wood, etc.