Question 11 Mark
Air is a bad conductor of heat.
Answer
View full question & answer→True
Questions
Write True or False, correct and rewrite the false statements.
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10 questions · self-marked practice — reveal the answer and mark yourself.
Question 21 Mark
Every warm substance continuously emits heat in all directions around itself.
Answer
View full question & answer→True
Question 31 Mark
A convection current always travels down wards.
Answer
View full question & answer→False – A convection current always travels upwards.
Question 41 Mark
Hot water is heavier than cold water.
Answer
View full question & answer→False – Hot water is lighter than cold water.
Question 51 Mark
During conduction, particles of the conductor leave their original place.
Answer
View full question & answer→False. During conduction, particles of the conductor do not leave their original place, but only vibrate in their own place.
Question 61 Mark
Copper is better conductor of heat than iron.
Answer
View full question & answer→True
Question 71 Mark
During radiation, the particles of the medium vibrate.
Answer
View full question & answer→True
Question 81 Mark
Radiation of heat depends upon the colours of the outer surface of the body.
Answer
View full question & answer→True![]()
Question 91 Mark
In a thermos flask, hot things remain hot and cold things become warm.
Answer
View full question & answer→False. In a thermos flask, hot things remain hot and cold things remain cold.
Question 101 Mark
Glass is a bad conductor of heat.
Answer
View full question & answer→True