What does material mean?
Anything you can touch - even gas
How many materials are there?
Nobody knows, but there are several million that we know of.
What are materials made up of?
A building set of bits called 'elements'. You can make lots of different materials with just a few elements.
What are some basic elements we use and know about?
Oxygen; hydrogen; iron; chlorine; copper; calcium; sodium. The list goes on!
What's in an element?
When you take apart the element you are left with the smallest bits called 'atoms'. They must be exactly the same for it to be an element. If they're not, it isn't an element.
What's a non-element?
Anything that has more than one kind of atom.