"...an atom or molecule with a net electric charge due to the loss or gain of one or more electrons." -google

        Ions are basically just atoms that have too many or too little of either protons or electrons. If you were an atom with more protons than electrons, you would no longer be an atom, but a positively charged Ion, opposing a negatively charged atom, which would be if you had more electrons than protons. Protons and electrons need to be equal for the state of an atom to be neutral, AKA 'normal'. So why are neutrons there? Lets say you had one ear. Ears are needed for a state of balance on the human body, which means you might have to try a little harder to stay upright and move straight, however, you can still survive, and hear for that matter. The neutrons are there to even out the weight difference within the atom, and they are present in every element except for ordinary hydrogen, which only has one proton and one electron. Positively charged ions can sometimes take away bits of static electrons floating around, like when you touch a doorknob and shock yourself. Negatively charged ions usually can't rip the nucleus of other atoms apart to find more protons, however, they can pass on some of their electrons to a positively charged ion and not expect any in return. Ions can be created, or rather, atoms can be disequalized, usually by scientists, geneticists, or some kind of physicists, by way of ionization, which involves taking the electrons from an atom (taking a conductive/magnetic material to it to force the atom to pass on electrons).

To learn more, go to the site below-

https://en.wikipedia.org/wiki/Ion

Black Holes

"A black hole is a place in space where gravity pulls so much that even light can not get out. The gravity is so strong because matter has been squeezed into a tiny space. This can happen when a star is dying.

Because no light can get out, people can't see black holes. They are invisible. Space telescopes with special tools can help find black holes. The special tools can see how stars that are very close to black holes act differently than other stars."

-http://www.nasa.gov/audience/forstudents/k-4/stories/nasa-knows/what-is-a-black-hole-k4.html

The Tailless Comet (C/2014 S3)

The Manx illustrated realistically

In 2014, a near-tailless comet was spotted while it flew by earth. It was called C/2014 S3 (PANSTARRS) or "MANX," since Manx cats are mostly tailless. Researchers are saying that it has just returned, and actually began it's voyage rather close to the sun, and may be able to tell us more about the building blocks of our planet, at least when it first walk out of fire. It was a majestic ball of what looked like a black rocky substance trying to contain super heated iron and gold by smothering it, trying to close in on it but in a grand struggle to do so. Of course, that's what we "think". We also "think" that we know about the layers of the earth and what they're made of. Us humans "think" a lot of things. But the more proof we have, the more sure we can be. Studies of the comet are being thought over.

Ingredients of jet fuel

"Jet fuel is a mixture of a large number of different hydrocarbons. The range of their sizes (molecular weights or carbon numbers) is restricted by the requirements for the product, for example, the freezing point or smoke point. Kerosene-type jet fuel (including Jet A and Jet A-1) has a carbon number distribution between about 8 and 16 (carbon atoms per molecule); wide-cut or naphtha-type jet fuel (including Jet B), between about 5 and 15."

https://en.wikipedia.org/wiki/Jet_fuel