EASY
7th CBSE
IMPORTANT
Earn 100

What is meant by good conductors of heat? Give examples of two materials which are good conductors of heat.

Important Questions on Heat

EASY
7th CBSE
IMPORTANT
What is meant by poor conductors of heat (or insulators of heat)? Give two examples of materials which are poor conductors of heat (or insulators).
EASY
7th CBSE
IMPORTANT

Classify the following materials into good conductors of heat and poor conductors of heat (or insulators):

Wood, Plastic, Copper, Air, Paper, Glass, Stainless steel, Aluminium, Thermocol, Rubber.

EASY
7th CBSE
IMPORTANT

Name the three ways in which heat is transferred. Which is the most important in:

Solids

EASY
7th CBSE
IMPORTANT

Name the three ways in which heat is transferred. Which is the most important in:

Liquids

EASY
7th CBSE
IMPORTANT

Name the three ways in which heat is transferred. Which is the most important in:

Gases

EASY
7th CBSE
IMPORTANT

Name the three ways in which heat is transferred. Which is the most important in:

Empty space (or vacuum)?

HARD
7th CBSE
IMPORTANT
Explain why, it is difficult to hold a stainless steel tumbler containing very hot tea in the hand but a thermocol cup containing the same hot tea can be held easily.
EASY
7th CBSE
IMPORTANT
Explain why, the clinical thermometer has a short temperature range from 35oC to 42oC?