Simplify the following text for a Grade 13 native English-speaking person.
Original: The Miller and Urey experiment ( or Ureyâ `` Miller experiment ) was an experiment that simulated hypothetical conditions thought at the time to be present on the early Earth , and tested for the occurrence of chemical origins of life .
Simplified: The Miller and Urey experiment ( or Ureyâ `` Miller experiment ) was an experiment to make organic compounds out of inorganic ones by applying a form of energy .