What is a nebula? Space and astronomy
The Eagle Nebula A nebula is a bunch of atoms and molecules floating in outer space, like a cloud of dust. More than one nebula are called nebulae, because -ae is the plural ending [...]
The Eagle Nebula A nebula is a bunch of atoms and molecules floating in outer space, like a cloud of dust. More than one nebula are called nebulae, because -ae is the plural ending [...]
A candle flame What's a combustion reaction? When two molecules bump into each other under the right circumstances, they may exchange electrons in ways that change both molecules into new kinds [...]
Kids eating food (thanks to USDA) - get ready to digest food! How do you digest food? When animals, including people like you, digest their food, they use an oxidation reaction to [...]
Plastic water bottles There are thousands of different kinds of plastic, from shopping bags to Fisher-Price toys to photographic film, CD's, and plumbing pipes. Some plastics, like chewing gum or [...]
A diagram of a sugar molecule found in outer space, from NASA Organic molecules means the kind of molecules that living things are made of - at least, all the [...]
Diagram of a nitrogen atom Inside a red giant star, the star smashes lighter atoms together. Smashing atoms gets the star energy to burn, and also leaves extra heavier atoms. Nitrogen [...]
A diagram of a hydrogen atom Hydrogen is the simplest kind of atom Hydrogen is the simplest kind of atom, and in the very earliest days after the Big Bang [...]
A model of a methane molecule - the simplest of hydrocarbons A kind of molecule Hydrocarbons are molecules. They are made out of hydrogen atoms and carbon atoms. Methane is [...]
Candles burn carbon A project with a candle and a spoon You can see the relationship between carbon, oxygen, and hydrogen easily at home or at school. You'll need a [...]
Tobacco plants growing put carbon dioxide molecules back into the air - like all plants What is carbon dioxide made of? Carbon dioxide is one of the simplest and commonest [...]