SOLAR SYSTEM

Detailed explanation-1: -At its beginning, Earth was unrecognizable from its modern form. At first, it was extremely hot, to the point that the planet likely consisted almost entirely of molten magma. Over the course of a few hundred million years, the planet began to cool and oceans of liquid water formed.

Detailed explanation-2: -It’s a remnant of olden times, the primordial days about 4.5 billion years ago when the entire planet was molten, an endless sea of magma.

Detailed explanation-3: -We conclude that an early molten earth is a hypothesis that deserves further study. Our calculations of solidification times indicate a period of 100 million to 1 billion years would be a reasonable estimate for the time required to solidify a molten mantle.

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.

Detailed explanation-5: -Earth’s original atmosphere was rich in methane, ammonia, water vapour, and the noble gas neon, but it lacked free oxygen.