ICSE ICSE Class 7 - CISCE Question Bank Solutions

Why are musical instruments provided with more than one string ?

How can the pitch of sound produced in a piano be changed ?

Draw a labelled diagram of a thermo flask. Explain how the transfer of heat by conduction, convection and radiation is reduced to a minimum in it.

List four substances which are good absorbers of sound.

List the measures that you will take when designing a sound-proof room.

Write true or false for a given statement.

The density of water is maximum at 4°C.

Write true or false for a given statement.

The speed 5 ms^-1 is less than 25 km h^-1.

Fill in the blank

 l m³ =..........cm³

 Fill in the blank

Mass = density × _______

Fill in the blank

1 g cm^-3 = _______ kg m^-3.

Fill in the blank

36 km h^-1 = _______ ms^-1.

 Fill in the blank

 Distance travelled d = ________ × time t

Match the following:

 Select the correct alternative 

 One litre is equal to :

A piece of paper of dimensions 1.5 m × 20 cm has area ______.

Select the correct alternative 

The correct relation is :

 Select the correct alternative 

The density of aluminium is 2.7 g cm-3 and of brass is 8.4 g cm^-3. For the same mass, the volume of:

Select the correct alternative 

 A block of wood of density 0.8 g cm^-3 has a volume of 60 cm³. The mass of block will be :

Select the correct alternative 

A boy travels a distance 150 m in 1 minute. His speed is

Select the correct alternative 

The correct relation for speed is