They were created with stone and wood and sometimes even bones, I hope this helped!
You can't really describe it but this is what it looks like http://www.chemspider.com/Chemical-Structure.453291.html
Explanation:
Volume is the quantity of three-dimensional
Place a burning splint near the opening of a test tube. If a popping noise occurs, it's probably hydrogen. Place a glowing splint in the test tube, and if it reignites, it could be oxygen. Place a burning splint into a test tube, and if it goes out, it could be carbon dioxide.
