Build your own electromagnet with a nail, some copper wire, and a battery What will I need? You can build your own electromagnet. Get about five meters of copper magnet wire (you can [...]
Gottfried Leibniz, a German mathematician - Enlightenment science What set off the Enlightenment? By 1650 AD, Europeans understood Islamic algebra and trigonometry better. Then they combined that with the exciting invention of the telescope and microscope (thanks to [...]
See how the degrees match up. Many hot things take up more room than the same things when they are cold. Thermometers take advantage of that to measure heat. The old-fashioned kind of [...]
Diagram of a uranium atom Uranium is a rare atom, not just on Earth but also in space and on other planets. There is not very much uranium anywhere. That's [...]
Diagram of an iron atom The protons inside the nucleus of an atom all have a positive electrical charge, so they push away from each other. But the strong nuclear [...]
What are quarks? Tiny particles found all over the universe. What are quarks? Quarks and electrons are the tiniest particles. There are three quarks in every proton and three in [...]
Autzen Stadium, in Eugene Oregon, seats 54,000 people A proton is a tiny particle, smaller than an atom. Protons are too small to see, even with an electron microscope, but [...]
A neutron star (from NASA) A neutron is a tiny particle like a proton, smaller than an atom. Like protons, neutrons are too small to see, even with an electron [...]
Lithium, cobalt, and oxygen atoms (as in a lithium-ion battery), seen under an electron microscope from Berkeley Labs What is an atom? Atoms are collections of tiny bits of matter, [...]
What is heat? A big campfire throws some serious heat Definition of heat When molecules of any kind of atoms get more energy in them than they had before, they [...]
