UNIVERSE
SOLAR SYSTEM FORMATION
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Question
[CLICK ON ANY CHOICE TO KNOW THE RIGHT ANSWER]
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radioactive materials from the sun produced a lot of heat energy
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intense collisions from planetesimals
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increasing weight of earth’s layers pressing down
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all of these
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Detailed explanation-1: -Earth’s original atmosphere was rich in methane, ammonia, water vapour, and the noble gas neon, but it lacked free oxygen.
Detailed explanation-2: -Earth’s earliest climates, before 4000Ma, reflected a relatively faint young Sun and a soupy greenhouse atmosphere rich in dust and gas, such as CO2 and NH3, generated by asteroid impacts, magmatic degassing, and high radioactive heat flux.
Detailed explanation-3: -When Earth formed 4.6 billion years ago from a hot mix of gases and solids, it had almost no atmosphere. The surface was molten. As Earth cooled, an atmosphere formed mainly from gases spewed from volcanoes. It included hydrogen sulfide, methane, and ten to 200 times as much carbon dioxide as today’s atmosphere.
Detailed explanation-4: -When Earth’s first organisms were formed, it may have been in an ice cold ocean. New research, published in Science Advances, indicates that both land and ocean were much colder than previously believed. A COLD OCEAN: Most researchers believe that Earth’s climatic conditions were hot at 3.5 Ga.