(English Medium) ICSE Class 9 - CISCE Question Bank Solutions

Convert the following temperature into Fahrenheit scale:
60⁰C

Convert the following temperature into Fahrenheit scale:
100⁰C

Convert the following temperature into Fahrenheit scale:
-40⁰C

Convert the following temperature into Fahrenheit scale:
85⁰C.

Convert the following temperature into Celsius scale:
104^oF

Convert the following temperature into Celsius scale:
95^oF

Convert the following temperature into Celsius scale:
113^oF

Convert the following temperature into Celsius scale:
 32^oF

Draw a neat and labeled diagram of a Six's maximum and minimum thermometer. Explain briefly, the working of this thermometer. Give a use of this thermometer.

Explain the three modes of transfer of heat.

A spiral cut from a thick chart paper is pivoted at 0 and is held slightly above a burning candle You will notice that the spiral starts moving. Explain.

Give a scientific reason for the following:
In winter the human body covered with a blanket keeps warm.

Give a scientific reason for the following:
It is better to use thin blankets to keep the body warm rather than using a single blanket of thickness equal to their combined thickness.

Give a scientific reason for the following:
In winter the birds fluff up their feathers.

Give a scientific reason for the following:
Old quits are less warm than the new ones.

Give a scientific reason for the following:
On a hot sunny day, it is advisable to wear light coloured clothes.

The hot metal ball is suspended from a string in a metal box as shown in the following figure

(i) What are the ways in which the ball loses heat

(ii) Which side of the box will be the hottest and which the least hot after some time? Explain.