cbse 6th Standard Science Sorting Materials into Groups Important Questions And Answers Study Material - QB365 Set C | QB365

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cbse 6th Standard Science Sorting Materials into Groups Important Questions And Answers Study Material - QB365 Set C

Published on: 24/10/2025

Question Set C

cbse 6th Standard Science Sorting Materials into Groups Important Questions And Answers Study Material - QB365

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Std: 6th Standard CBSE - Science

chapter: Sorting Materials into Groups - Important Questions And Answers

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Questions:

Generic 3

5 x 3 = 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?

What are lustrous materials? Give two examples

Write three advantages of grouping.

Why are handles of utensils made from wood or plastics?

Select those objects from the following which shine:
Glass bowl, plastic toy, steel spoon, cotton shirt

Generic 2

5 x 2 = 10

Arrange the jumbled words to arrive at the appropriate names of materials and also write two uses of each.
(a) milaunuim
(b) tcaslpi
(c) soekrnee
(d) gaviner

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

Why don't we use steel handles in utensils?

Find the odd one out from the following:
(a) Chair, Bed, Table, Baby, Cupboard
(b) Rose, Jasmine, Boat, Marigold, Lotus
(c) Aluminium, Iron, Copper, Silver, Sand
(d) Sugar, Salt, Sand, Copper Sulphate

10.

On a bright sunny day, Shikha was playing hide and seek with her brother. She hid herself behind a glass door. Do you think her brother will be able to locate her? If yes, why? If no, why not?

True or False

2 x 1 = 2

11.

Liquids which mix well with water are called immiscible liquids.

(a)

True

(b)

False

12.

A piece of wood floats on water.

(a)

False

(b)

True

Generic 5

3 x 5 = 15

13.

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.

14.

During summer holidays, a group of children collected a lump of salt, green grass, broken glass piece, a small thermocol box, pen, iron nail, glass. marbles, hair, naphthalene ball, a piece of sugar candy (mishri) and tried to group them on the basis of properties given in table. Help them in filling the table.

Name of material

Appearance (Hard/Soft)

Transparency (Transparent/Translucent/Opaque)

Floats/Sinks in water

Soluble/Insoluble in water

15.

Why do you think oxygen dissolved in water is important for the survival of aquatic animals and plants.

Multiple Choice Question

4 x 1 = 4

16.

Select the odd one:

(a)

Glass

(b)

Air

(c)

Stone

(d)

Water

17.

Select a transparent substance:

(a)

Metal

(b)

Polished wood

(c)

Mirror

(d)

Glass

18.

Find the odd one out from the following.

(a)

Tawa

(b)

Spade

(c)

Pressure cooker

(d)

Eraser

19.

An iron nail is kept in each of the following liquids. In which case would it lose its shine and appear dull?

(a)

Mustard oil

(b)

Soft drink

(c)

Coconut oil

(d)

Kerosene

Fill up / 1 Marks

2 x 1 = 2

20.

Objects lighter than a liquid _____ in that liquid.

21.

Materials which do not disappear in water are called ____________ materials.

Match the following

1 x 1 = 1

22.

Shoes

1 Marks

1 x 1 = 1

23.

How are the gases dissolved in water important for living organisms?

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Answers Key:

Generic 3

5 x 3 = 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.

The materials which have shining surface are called lustrous materials. Gold and silver are examples of lustrous materials.

(1) It helps in gaining systematic knowledge of things.
(2) It gives a general idea about all the members of a group and the differences between the members of different groups.
(3) It is convenient to work with all members of a group after knowing their properties

The handles of utensils are made from wood or plastics because utensils are good conductors of heat whereas wood and plastic are bad conductors of heat. They do not allow the heat transmission through them. So, the handles of utensils are made from wood or plastics so that our hand does not burn while handling these utensils when they are hot.

From the given Objects, glass bowl and steel spoon are shiny objects which also called lustrous materials.

Generic 2

5 x 2 = 10

(a) Aluminium: Uses - in foil and aircrafts
(b) Plastic: Uses - in bucket and pencil box
(c) Kerosene: Uses - as fuel and solvent
(d) Vinegar: Uses - as food ingredient and preservative

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

Steel is a good conductor of heat, so it cannot be used as handle in utensils

(a) Baby
(b) Boat
(c) Sand
(d) Sand

10.

Yes, her brother can easily locate her because glass door is a transparent material.

True or False

2 x 1 = 2

11.

(b)
False

12.

(a)
False

Generic 5

3 x 5 = 15

13.

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

14.

The complete table is shown as below:

Name of the material	Appearance (Hard/Soft)	Transparency (Transparent/Translucent/Opaque)	Floats/Sinks in water	Soluble/Insoluble in water
Lump of salt	Hard	Opaque	Sinks	Soluble
Green grass	Soft	Opaque	Floats	Insoluble
Broken glass piece	Hard	Transparent	Sinks	Insoluble
A small thermocol box	Soft	Opaque	Floats	Insoluble
Pen	Hard	Opaque	Sinks	Insoluble
Iron nail	Hard	Opaque	Sinks	Insoluble
Glass marbles	Hard	Transparent	Sinks	Insoluble
Hair	Soft	Opaque	Floats	Insoluble
Naphthalene ball	Hard	Opaque	Sinks	Insoluble
A piece of sugar candy (mishri)	Hard	Translucent	Sinks	Soluble

15.

Oxygen gas dissolves in water, i.e. oxygen gas is soluble in water. The plants and animals which live in water use the oxygen dissolved in water for respiration. Thus, oxygen gas dissolved in water is very important for the survival of animals and plants that live in water.

Multiple Choice Question

4 x 1 = 4

16.

17.