Miller mixed "atmospheric" gases (hydrogen, methane, ammonia, and water vapor) in a sterile glass container and charged them with energy by adding electric sparks to them. The electric sparks resembled lightning at the time of the Earth's formation. ...
According to many texts, before a scientist develops a hypothesis about anything, that individual notices something that sparks his or her imagination. 2. ... Experiment/Test. ... A well-designed experiment will test that prediction. ... Other experiments are simply quantitative observations and might be better described as tests. Astronomy is a science in which many experiments are essentially what I have just described as tests. 6. ...
