Miller-Urey Experiment GCSE Chemistry Unit 1

  • Created by: Sophie
  • Created on: 25-05-14 11:13

Amino Acids

Amino acids make up the molecules that make up living things.

Most amino acids contain:

  • Hydrogen
  • Carbon
  • Nitrogen
  • Oxygen
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Miller and Urey

Miller and Urey tried to recreate the Earth's early conditions to see if amino acids could be created.

To model the early atmosphere, they used a mixture of:

  • Water (H2O)
  • Amonia (NH3)
  • Methane (CH4)
  • Hydrogen (H2)

Under normal conditions these gases do not react, so they used a high voltage spark to stimulate the energy transferred from a lightening bolt.

After a week, they found 11 amino acids in the mixture.

This provided evidence that it was possible the early life molecules were formed from the gases in the Earth's early atmosphere. 

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