MCQ Questions

Question No. 1

State True or False for the following and correct the false statements giving reasons.

Answer :

(1) When we look at the world it is a 2-D, perception.

(2) Equal volume of different substance have the same mass.

(3) Speed tells us how slow a body is moving.

(4) Equal mass of different substances have the same volume.

(5) S.I. unit of volume is litre.

(6) S.I. unit of speed does not exist because it is a ratio.

Question No. 2

Fill in the blanks

Question No. 3

Short answer type questions

Question No. 4

Long answer type questions

Answer :

(4) Expressions such as “as light as a feather or as heavy as lead”, indicate that equal volumes of different substances can vary considerably in their masses. Explain.

(7) Explain the steps in finding the volume of a stone.

(9) If you and your friend are running a 100 m race. How will you know who ran faster?

(1) Explain with example, steps to measure the volume of a regular 3-dimensional object.

(2) Explain how we can measure the area of an irregular 2–dimensional body?

(3) How can we measure the density of an irregular body?

(5) If the mass of an object is 50 kg and its density 100 kg/m3 , what would be its volume?

(6) A bottle of capacity 500 ml weighs 250 g when empty and 500 g when filled with water and 625 g when filled with glycerin. Calculate the density of water and glycerine. Which liquid is denser and by how much?

(8) Explain the meaning of the term 'speed' with an example.

Question No. 5

Match the three columns :

Answer :

Question No. 6

When a plastic toy is floating on water:

Answer :

We can measure its volume by the amount of water it displaces

We can measure its volume by using a calibrated beaker only

We can measure its volume by tying it with a stone

We cannot measure its volume

Question No. 7

Parallax error can be corrected by :

Answer :

Taking many readings and calculating its mean

Keeping the eye level just below the reading mark

Keeping the eye level just above the reading mark.

Keeping the eye level near the reading mark

Question No. 8

A substance of high density will have –

Answer :

Less matter per unit volume

More matter per unit volume

Less volume for less amount of matter

More volume for more amount of matter

Question No. 9

A block of wood has a density of 0.9 g/cm3 and a volume of 50 cm3 , what shall be the mass of the block?

Answer :

45 g

55.5 g

41 g

50.9 g

Question No. 10

Area of two dimensional irregular figure can be estimated more accurately when –

Answer :

The grid paper has grids of larger size

The grid paper has grids of smaller size

The size of the grid in the paper does not make a difference

Plain paper is better than grid papers for the purpose

Question No. 11

When Density = Volume/ Mass, then Mass is equal to –

Answer :

Volume/Density

Density /Volume

Density /Mass x Volume

Density x Volume

Question No. 12

For volume the S.I. unit is cubic meter, which can be written as m3 . Why do we write m3 ?

Answer :

Because volume of a unit cube is 1 m × 1 m × 1 m.

For volume the S.I. unit is square meter.

Because it is m multiplied by the 4, visible sides.

Because volume of a unit cube is 3 × 1 m.

Question No. 13

The space occupied by a ball is :

Answer :

Capacity

Volume

Mass

Weight

Question No. 14

The area of a soccer field is :

Answer :

Space occupied by it

Volume occupied by it

Capacity it represents

Surface occupied by it

Question No. 15

The density of aluminium is 2.7g/cm3 and that of iron is 7.8g/cm3 so for the same volume the mass of :

Answer :

Iron will be more than aluminium

Aluminium will be more than iron

Aluminium and iron will be same

It will depend on the effect of gravitational force

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