oral presentation

2.  An invention is a new, useful thing or process
wich is made by humans and didn’t exist
before.
 EXAMPLES
Computer Telephone Television Clock

3.  A discovery is a new, useful thing or process
that was hidden or unknown.
 EXAMPLES
Penicilin DNA Fire Electricity

4.  The main difference is that discoveries existed
before, but we didn’t know about them, and
inventions were created artificially.