ICSE ICSE Class 8 - CISCE Question Bank Solutions for Physics

Differentiate between melting point and boiling point, giving atleast one example of each.

Explain the term vaporization.

Explain the terms boiling point.

A liquid can change into vapour state at a fixed temperature.

Describe an experiment to demonstrate that water absorbs heat during boiling at a constant temperature.

State the boiling point of water.

A certain quantity of water is heated from 20°C to 100°C. Its temperature is recorded after each 1 minute. The observations are:

The atmospheric pressure is nearly 10⁵ Pa.

The atmospheric pressure on earth surface is nearly .............. .

The atmospheric pressure at sea level is nearly

Nose bleeding may occur at a high altitude because

What do you mean by atmospheric pressure?

Write the numerical value of the atmospheric pressure on the earth surface in pascal.

We do not feel uneasy even under the enormous atmospheric pressure. Give a reason.

Describe a simple experiment to illustrate that air exerts pressure.

Give reason for the following:
 A balloon collapses when air is removed from it.

Give reason for the following:

Water does not run out of a dropper unless its rubber bulb is pressed.

Give reason for the following :
Two holes are made in a sealed oil tin to take out oil from it.

How does the atmospheric pressure change with altitude?

In the household electric circuit, if one bulb is fused in a room, the other bulbs keep glowing. Explain the reason.