Sorting Materials into Groups Test

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Sorting Materials into Groups Test - 8

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Weekly Quiz Competition

Question 1
1 / -0

During the formation of rain, when water vapour changes back to liquid in the form of rain drops:

A
heat is absorbed

B
heat is released

C
heat is first absorbed and then released

D
there is no exchange of heat

Solution

The energy contained in the gaseous form (vapour) is more than the energy contained in the liquid form (water). Therefore when vapour changes to water it loses some heat.
Question 2
1 / -0

Which of the following type of bodies form sharp shadows when placed in the path of light?

A
Transparent

B
Translucent

C
Both A and B

D
Opaque

Solution

Transparent bodies allow light to pass through them whereas translucent bodies allow some light to pass through them.
Opaque bodies do not allow light to pass through them when placed in the path of light, therefore the sharp shadows are formed by the opaque bodies.

Hence, option D is correct.
Question 3
1 / -0

A vendor sells white powdered salt mixed with white powdered stone. The knowledge of which property will help you detect this malpractice?

A
Ductility

B
Opacity

C
Density

D
Solubility

Solution

Salt will dissolve in water fast but the stone particles would not. Hence, solubility of salt and stone can differentiate them.
Question 4
1 / -0

Which of the following is lustrous?

A
Steel furniture

B
Wooden furniture

C
Plastic chair

D
Football

Solution

Different objects look different from each other according to the material they are made from. The appearance depends on color, hardness, texture, and lustre. Metals are lustrous due to free electrons on their surfaces. Hence materials made of metals have lustre.
Question 5
1 / -0

Select the objects which are opaque.

A
water, oil and soil

B
soil, sand and dust

C
glass, grass and gum

D
marvel, oiled paper and magnet

Solution

Opaque objects are materials that do not allow light to pass through them.
Examples are- Soil, sand and dust.
Hence, option $$B$$ is correct.
Question 6
1 / -0

What do you call a substance through which things are partially visible?

A
Opaque object

B
Transparent object

C
Lustrous object

D
Translucent object

Solution

The material which does not allow light to pass through it is called opaque and material that allows light to pass through it is called transparent. The material through which light can pass partially is called translucent, e.g. butter paper.
Question 7
1 / -0

Which of the following is translucent?

A
Copper

B
Wood

C
Butter paper

D
Glass

Solution

The material through which light can pass partially is called translucent, e.g. butter paper, thin curtain, tinted glass etc.
Question 8
1 / -0

Name two transparent materials.

A
Glass and wood

B
Plastic and cold wax

C
Plastic and glass

D
Water and honey

Solution

Materials that allow light to completely pass through them without getting scattered are called transparent material.
Example- Plastic, Glass.
Question 9
1 / -0

Identify the odd one out.

A
Books

B
Notebooks

C
Chair

D
Newspaper

Solution

Option $$A,\ B\ and\ C$$ are objects made up of paper, while Option $$C$$ is an object not made up of paper. hence is the odd one out.
Question 10
1 / -0

You are provided with the following four materials like wood, plastic, wool, and steel. Which of the given material will you identify as hardest and softest respectively?

A
Wood and wool

B
Plastic and steel

C
Wool and steel

D
Steel and wool

Solution

Materials that are difficult to compress are called hard and materials that are easy to compress are called soft.
Hard materials: Steel, wood, plastic, etc.
Soft materials: Wool, cotton, etc.
Here $$\text{steel >wood>plastic>wool}$$ [In terms of hardness]
So, steel is the hardest and wool is the softest material.

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Sorting Materials into Groups Test - 8

Result

Sorting Materials into Groups Test - 8

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SHARING IS CARING

Question 1

heat is absorbed

heat is released

heat is first absorbed and then released

there is no exchange of heat

Solution

Question 2

Transparent

Translucent

Both A and B

Opaque

Solution

Question 3

Ductility

Opacity

Density

Solubility

Solution

Question 4

Steel furniture

Wooden furniture

Plastic chair

Football

Solution

Question 5

water, oil and soil

soil, sand and dust

glass, grass and gum

marvel, oiled paper and magnet

Solution

Question 6

Opaque object

Transparent object

Lustrous object

Translucent object

Solution

Question 7

Copper

Wood

Butter paper

Glass

Solution

Question 8

Glass and wood

Plastic and cold wax

Plastic and glass

Water and honey

Solution

Question 9

Books

Notebooks

Chair

Newspaper

Solution

Question 10

Wood and wool

Plastic and steel

Wool and steel

Steel and wool

Solution

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