GEOLOGY

Detailed explanation-1: -Earth is estimated to be 4.54 billion years old, plus or minus about 50 million years. Scientists have scoured the Earth searching for the oldest rocks to radiometrically date.

Detailed explanation-2: -It is widely accepted by both geologists and astronomers that Earth is roughly 4.6 billion years old. This age has been obtained from the isotopic analysis of many meteorites as well as of soil and rock samples from the Moon by such dating methods as rubidium–strontium and uranium–lead.

Detailed explanation-3: -The age of the solar system, derived from the study of meteorites (thought to be the oldest accessible material around) is near 5 billion years; that of the Earth is taken as 4.6 billion years. The oldest rocks on Earth are dated as 3.8 billion years.

Detailed explanation-4: -First earth forms from solar nebulae. Moon forms. First evidence of life – prokaryote. First evidence of nucleus – eukaryote (endosymbiosis?) First evidence of multicellular life. More items •29-Aug-2013