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To see if biological compounds could form spontaneously on early Earth

To see if simple molecules can combine spontaneously.

To find out how biological molecules could have first formed

How life can evolve from nonliving matter

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Beulah Skiles

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2y ago
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14y ago

The goal of the famous 1953 Miller-Urey experiment was to test the Oparin-Haldane hypothesis, which postulated that Earth's early atmosphere was a reducing and could form organic compounds from simple molecules. They also suggested that the energy for this synthesis of organic compounds came from lighting and UV radiation.

As a result, Miller and Urey experiment created laboratory conditions like the ones thought to have existed on early Earth. Their apparatus included a warmed flask of water simulating the primeval sea and a system of hydrogen, methane, ammonia, and water vapor to mimic the hypothesized strongly reducing atmosphere on early Earth. They then discharged sparks, simulating lightning, in that atmosphere. The atmosphere was then cooled by a condenser, and water and dissolved compounds rained into the miniature sea. Interestingly, when Miller and Urey analyzed their collected samples, they discovered that this experiment yielded various amino acids found in organisms today such as alanine and glutamic acid as well oily hydrocarbons and other organic compounds. From these results, Miller and Urey concluded that the Oparin-Haldane hypothesis was correct: a strongly reducing atmosphere can produce organic molecules, a first step in the origin of life.

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13y ago

the miller-urey experiment was conducted in 1952 by scientists Stanley Miller and Harold Urey who created an early earth's atmosphere containing reducing inorganic gases(methane, ammonia,water vapors,nitrous oxide,nitrogen) and lightening to know how the life on earth started... the result was the production of organic substances like DNA base pairs(adenine) which may had triggered the first life form on earth.

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10y ago

The Miller-Urey experiment used a sealed container of gases which were thought to resemble the chemical composition of the planet Earth in its early history, before the evolution of life. These gases were subjected to electric sparks to simulate the effect of lightning. The interesting result was that amino acids were synthesized, which suggests that the chemicals necessary for the evolution of life could have been created by ordinary physical processes that took place in the early history of the Earth.

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Q: What was the Miller and Urey experiment What did it demonstrate?
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Related questions

Miller and urey's experiments attempted to demostrate?

Miller and Urey's experiments attempted to demonstrate the chemical origins of life. They first conducted the experiment in the year 1953.


Why Urey-Miller experiment so important?

The Urey-Miller experiment showed that organic compounds could arise from inorganic compounds. ~VietPride


Miller and urey's experiments attempted to demonstrate?

The Miller-Urey experiment combined amino acids and other chemicals thought to be a part of the primordial soup. The experiment attempted to demonstrate the conditions on Earth in its early years.


What did miller and urey's experiments attempted to demonstrate?

The origin of life.


Urey and miller used an electric current in their experiment to simulate?

Lightning.


Where did the miller urey experiment happen?

it happend on christmas day. it was a big suprise


How did the Miller-Urey experiment impact the way scientists think about the origins of life?

no


What could replace lightning in the miller-urey experiment?

During their experiment, they used electrical sparks to stimulate the variable of the lightning.


What did the Miller-Urey experiment demonstrate about Archean Earth?

life began in ocean that amino acids were likely abundant


In the Miller-Urey experiment what was used as energy source to drive chemical reactions?

Electrical discharge


In addition to hydrogen the gases used in miller and urey's experiment were?

Carbon dioxide and hydrogen sulfide


What type of molecules did miller and urey find?

by doing their experiment they found protein and aft sacs