HEAT.

In physics, we're learning all about the wonderous world of heat and thermal energy. Well, according to Mr. LoGalbo, a seemingly trustworthy source, there is no cold. Just a lack of movement of molecules. Temperature is the measure of the movement of molecules, and heat is the transfer of that speed from one molecule to the other. Therefore, feeling something that is hot is a bunch of the fast little particles hitting your slow little particles on your hand. Like, the stove molecules hit your hand really fast and then your hand molecules get fast. Therefore hot. Isn't that a weird concept? I just can't imagine the microscopic world. All everything is is just molecules. Little atoms, with swirling atoms. Technically, around 90 percent of an atoms space is completely unoccupied. There's nothing there. Nothing at all, for 90% of an atom. Which means what makes up everything is mostly not even there. The super crazy fast movement of the electron provides the stability and structure and function of an atom. Also, just a few more positive and negative charges on an atom can turn lead into gold. Or hydrogen into gold. Or oxygen to gold. The only difference between the elements is a few different charges. + or - decides whether an atom is the most valuable substance on the planet or deadly if it comes anywhere near a human. I don't think I'll ever be able to comprehend the microscopic world.