Learn more physics!
what is heat?!
- sarah (age 14)
To understand what heat is, we have to think about things that are really really little. If I were to take something and break it up into about the smallest pieces I could get, Iíd get whatís called an atom. Sometimes, a few atoms stick together and make whatís called a molecule. So everything around us (including us) is made up of these little atoms and molecules.
The wierd thing is that even if the big thing (like a cup of water) is sitting perfectly still, all of the atoms and molecules that make it up are moving around all the time. And the faster they move, the hotter the thing is. So when I heat up a glass of water, Iím actually making the molecules in the water move faster.
So heat is just the energy that I need to put into the glass of water to make the molecules move faster!
(published on 10/22/2007)
Follow-up on this answer.