Miller Urey Experiment

Earth's Earlier Atmosphere-

-hotter than it is now and there was little to no oxygen available. -Composed of gases such as hydrogen cyanide (HCN), Carbon dioxide (CO2), Carbon Monoxide (CO), nitrogen (N2), Hydrogen sulfide (H2S) and water (H2O). Which are poisonous to our present day organisms.

first organism-

was anaerobic.

Stanley Miller and Harold Urey-

studied the early conditions of Earth's atmosphere.They wanted to test if Alexander Oparin's and J.B.S> Haldane's hypothesis that conditions on primitive Earth could result in the synthesis of organic compounds from inorganic molecules.

Which chemicals did Miller and Urey use in the experiment?

Metrane (CH4), Hydrogen (H2), Ammonia (NH3), Water Vapor (H2O)

why were those particular chemicals used?

to represent the Earth's early day atmosphere

Why was it necessary to seal the gasses inside the network of sterile flasks and glass tubes?

to represent the atmosphere more

why was a heat source needed?

the atmosphere was hotter than what it is now.

what was the purpose of the electrical spark?

it simulated lightning, which led to the formation of organic molecules from inorganic.

what was the produced in the miller Urey experiment?

Produced a variety of organic compounds, such as amino acid.

why were the products of the experiment so important?

it proved that organic molecules could produce inorganic molecules

what are some strengths and weaknesses of the Miller Urey Experiment?

strengths- has a reaction of early earth

weakness- wasn't to scale

what were some of the possible energy sources for early life?

lightning

why is it so important in science to use models and repeated experiments?

to make sure you're accurate with your hypothesis and theory.

what are the 2 heat sources in the experiment-

water and the spark

everything on earth comes from

cells

Early life need one

cell membrane, genetic material

RNA-

has a genetic coat, ACUG certain way you have to combine

Charles Darwin said to test in a

Warm pond

The light changed

the letters, C & U aren't found in DNA