MEDIUM
7th CBSE
IMPORTANT
Earn 100

What is meant by 'convection'? Explain with the help of an example. Why is it that convection cannot take place in solids?

Important Questions on Heat

HARD
7th CBSE
IMPORTANT
AWARENESS SCIENCE for Seventh Class>Chapter 4 - Heat>Long Answer Type Questions>Q 55
Define radiation. Give any two examples where heat is transferred by radiation. What is the name of invisible heat rays which transfer heat by radiation?
EASY
7th CBSE
IMPORTANT
AWARENESS SCIENCE for Seventh Class>Chapter 4 - Heat>Multiple Choice Questions (MCQs)>Q 56
An iron ball at 40°C is dropped in a mug containing water at 40°C. The heat will :
EASY
7th CBSE
IMPORTANT
AWARENESS SCIENCE for Seventh Class>Chapter 4 - Heat>Multiple Choice Questions (MCQs)>Q 57
Some stainless steel frying pans are provided with copper bottoms. The reason for this could be that _____.
EASY
7th CBSE
IMPORTANT
AWARENESS SCIENCE for Seventh Class>Chapter 4 - Heat>Multiple Choice Questions (MCQs)>Q 58
A wooden spoon is dipped in a cup of ice cream. Its other end:
EASY
7th CBSE
IMPORTANT
AWARENESS SCIENCE for Seventh Class>Chapter 4 - Heat>Multiple Choice Questions (MCQs)>Q 59
The device used for measuring temperature is called:
EASY
7th CBSE
IMPORTANT
AWARENESS SCIENCE for Seventh Class>Chapter 4 - Heat>Multiple Choice Questions (MCQs)>Q 60
The expansion of one of the following liquids is used for measuring the temperature in ordinary thermometers. This liquid is:
EASY
7th CBSE
IMPORTANT
AWARENESS SCIENCE for Seventh Class>Chapter 4 - Heat>Multiple Choice Questions (MCQs)>Q 61
Which of the following features is that of a clinical thermometer?
a. Short temperature range
b. Wide temperature range
c. Alcohol filled glass bulb
d. Constriction in glass tube
EASY
7th CBSE
IMPORTANT
AWARENESS SCIENCE for Seventh Class>Chapter 4 - Heat>Multiple Choice Questions (MCQs)>Q 62
The normal temperature of a healthy person is thirty seven degrees on: