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there were meteorites, a lot of space debris and lightning and liquid water eventually made the oceans.
Mainly by photosythesis that converted the CO2 in the poisonous early atmosphere, into oxygen.
The Earth is indeed round. It only seems flat because of its vast size compared to a human being. If you look out to sea on a clear day - its possible to see the curve of the earth in the distance. Early explorers (not knowing any different) actually believed it was possible to fall off the edge of the earth. They thought the distant horizon line where the sky meets the land, was the edge of the Earth.
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Because they were made the same time as the Earth from the same materials. And, since they have basically been frozen in time in outer space, they can tell us a lot about the composition of the Earth. The materials on Earth are constantly being recycled and nothing remains from the birth of the Earth, so that is why we look to outer space and the meteorites that fall to Earth to give us clues to its origin.
the earth
The surface of early earth was mostly molten and volcanic. The atmosphere was hot and highly toxic.
Protobionts are naturally arising cell-like but not alive structures that spontaneously form in mixtures of abiotically generated organic molecules. The Fox and Oparin experiments show conditions in the early Earth can lead to their formation. The Miller-Urey and similar experiments show how early conditions on earth can lead to the complex organic molecules like saccharides and nucleotides that are needed to form protobionts.
To my knowledge: Miller And Urey Modle The conditions by Laboratory Experiments
Miller and Urey
there were meteorites, a lot of space debris and lightning and liquid water eventually made the oceans.
Harold Urey and Stanley Miller used a mixture of gases such as methane, ammonia, water vapor, and hydrogen to simulate the early Earth's atmosphere in their laboratory experiments. They then subjected this mixture to electrical sparks to mimic lightning, creating amino acids and other organic compounds, potentially similar to those that could have formed on early Earth.
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.
Two possible sources of simple organic compounds on the early Earth could be from the abiotic synthesis of organic molecules in the atmosphere or the delivery of organic-rich meteorites and comets.
Stanley Miller conducted the famous Miller-Urey experiment in 1953, which demonstrated that amino acids, the building blocks of proteins, could be formed under conditions simulating early Earth. This experiment provided support for the hypothesis that the building blocks of life could have arisen from simple chemical reactions on a young Earth.
Miller and Urey
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