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Explain why Earth and other planets were not solid when they formed during the beginning of the Precambrian, approximately 4,600 million years ago (MYA). What was this particular time period called, and why is this time period not really considered apart of Earth’s geological history?

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A) Earth was formed by accretion from the Solar nebula. That is that, at first, atoms and molecules started colliding, forming dust and debris; that debris started colliding with each other, slowly forming a protoplanet.
Due to natural radiation of the elements and to the various impacts of the debris, the temperature of the protoplanet was very high. 
At this kind of temperature rocks and all the other materials were fused in a homogeneous matter, which started to solidify when the temperature decreased. 

B) This particular period is called Hadean eon and it is the very beginning part of Precambrian.

C) The Hadean eon started when Earth started forming and ended with the solidification of the crust, the formation of the atmosphere (mostly carbon dioxide) and the condensation of water into seas and oceans. For these reasons it is not considered apart from Earth's geological history, even thou rocks dated so back in time are rare to find.

A) Earth was formed by accretion from the Solar nebula. That is that, at first, atoms and molecules started colliding, forming dust and debris; that debris started colliding with each other, slowly forming a protoplanet.

Due to natural radiation of the elements and to the various impacts of the debris, the temperature of the protoplanet was very high.  

At this kind of temperature rocks and all the other materials were fused in a homogeneous matter, which started to solidify when the temperature decreased.  

B) This particular period is called Hadean eon and it is the very beginning part of Precambrian.

C) The Hadean eon started when Earth started forming and ended with the solidification of the crust, the formation of the atmosphere (mostly carbon dioxide) and the condensation of water into seas and oceans. For these reasons it is not considered apart from Earth's geological history, even thou rocks dated so back in time are rare to find.

A) Earth was formed by accretion from the Solar nebula. That is that, at first, atoms and molecules started colliding, forming dust and debris; that debris started colliding with each other, slowly forming a protoplanet.

Due to natural radiation of the elements and to the various impacts of the debris, the temperature of the protoplanet was very high.  

At this kind of temperature rocks and all the other materials were fused in a homogeneous matter, which started to solidify when the temperature decreased.  

B) This particular period is called Hadean eon and it is the very beginning part of Precambrian.

C) The Hadean eon started when Earth started forming and ended with the solidification of the crust, the formation of the atmosphere (mostly carbon dioxide) and the condensation of water into seas and oceans. For these reasons it is not considered apart from Earth's geological history, even thou rocks dated so back in time are rare to find.

A) Earth was formed by accretion from the Solar nebula. That is that, at first, atoms and molecules started colliding, forming dust and debris; that debris started colliding with each other, slowly forming a protoplanet.

Due to natural radiation of the elements and to the various impacts of the debris, the temperature of the protoplanet was very high.  

At this kind of temperature rocks and all the other materials were fused in a homogeneous matter, which started to solidify when the temperature decreased.  

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