Observing heat conduction by metals:
Take an iron rod. Stick pins on it with the help of wax. Now fix the rod to a stand. Heat one end rod with a spirit lamp and see how the pinds fall off.
Why did the pins fall from iron rod?

Observing heat conduction by metals: Take an iron rod. Stick pins on it with the help of wax. Now fix the rod to a stand. Heat one end rod with a spirit lamp and see how the pinds fall off. Pin of which end fell first?

Which one of the paper pins will fall off from the metal rod first?

Jaya has taken an iron rod and fixed pins with the help of wax on one side. On the other side, she heated the iron rod. By observing the phenomena that she came to know._______a) Wax is melted on heating b) Iron is a good conductor of heat c) Iron is an insulator.

Which colours do you observe when an iron rod is gradually heated ?

How the colour of iron rod changes during the heating?