Physics
The method of magnetisation is:

Passing alternating current through it
Hammering a magnet
Passing direct current through it
Heating a magnet

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Physics
The earth is a

Non-absorber of heat
Bad absorber and bad radiator of heat
Good reflector of heat
Good absorber and good radiator of heat

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Physics
A stone floor feels cold to the bare feet but a carpet on the same floor feels warm. This is because

The carpet is a better conductor of heat than the stone
The stone conveys the heat away from the feet more rapidly than the carpet
The floor and carpet are at different temperatures
The human body maintains a constant temperature

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