* Humans sense heat and cold based on heat transfer in or out of their body.
* When you pick up a snowball and it feels *very* cold, it’s because a lot of heat is being sucked out of your hand.
* When you grab a hot steering wheel in your car in the summer time, it feels hot because a lot of heat is being pushed into your hand.
* Some materials are better at conducting heat than others.
* When you touch them heat transfers faster than another object so you feel that temperature more intensely.
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