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

1

(a)

Mustard oil

(b)

Soft drink

(c)

Coconut oil

(d)

Kerosene

Pick one material from the following which is completely soluble in water.

1

(a)

Chalk powder

(b)

Tea leaves

(c)

Glucose

(d)

Sawdust

While doing an activity in class, the teacher asked Paheli to handover a translucent material. Which among the following materials will Paheli pick and give her teacher?

1

(a)

Glass tumbler

(b)

Mirror

(c)

Muslin cloth

(d)

Aluminium foil

Select a transparent substance:

1

(a)

Metal

(b)

Polished wood

(c)

Mirror

(d)

Glass

Copper metal is a

1

(a)

Good conductor of heat

(b)

Highly magnetic material

(c)

Translucent material

(d)

Ornamental metal

Materials which cannot be compressed are called ___________ materials.

1

(a)

hard

Dried leaves ______________ on the surface of water.

1

(a)

float

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

1

(a)

Insoluble

Metals are good of __________ heat

1

(a)

conductors

The property which is identified with nose is _________

1

(a)

odour

A piece of wood floats on water.

1

(a) False

(b) True

Sugar does not dissolve in water.

1

(a) True

(b) False

Oil mixes with water.

1

(a) True

(b) False

Sand settles down in water.

1

(a) False

(b) True

Vinegar dissolves in water.

1

(a) False

(b) True

Is grouping necessary? Give one reason.

1

(a)

Yes, grouping is necessary. By grouping, we can find required items whenever required, easily and can also compare them with similar items.

If you have to select a handle made of steel, wood or rubber for your screw driver, which one will you prefer and why?

1

(a)

I will prefer wood, as it is insulator of electricity as well as easily workable.

Cotton is a soft material that can be compressed. Name two hard materials 

1

(a)

Metals and stones

Is wood ductile or not?

1

(a)

No, it is not ductile

Wood is used as a fuel. Which property makes it suitable for this purpose?

1

(a)

Combustibility.