If you are looking for basic chemistry information, stay on this site. It's not just for kids, it's for everyone. We have information on matter, atoms, elements, the periodic table, reactions, and biochemistry.
So you're asking, what is CHEMISTRY? Well... Here's our best definition. Chemistry is the study of MATTER and the changes that take place with that matter.
Don't ask us why that matters. It just does. A lot. Everything on Earth, everything in our solar system, everything in our galaxy, and everything in the universe is made up of matter. Matter is the name that scientists have given to everything that you can touch, or see, or feel, or smell. Go take a look!