They were created with stone and wood and sometimes even bones, I hope this helped!
Answer:
Solution
Explanation:
Compound - a chemical substance made by elements of different densities to form a chemical union.
Element - Any one of the simple chemical substances that can't decompose in a chemical reaction
They actually have the same amount of kinetic energy but the bus I would say is more cuz it weighs more mass, more mass means the more energy it's going to need.