Question

my planet,my place essay of 750 words​

Answer 1

The age of the Earth is estimated at a little over 4.5 billion years.[1] Working this out was a difficult problem to solve. For most of human history, the basic facts about the planet were unknown. The problem was tackled by Earth scientists in the twentieth century.[1]

Modern estimates are based on radioactive dating methods. The oldest minerals on Earth – small crystals of zircon from the Jack Hills of Western Australia – are at least 4.4 billion years old.[2][3][4] Ca-Al-rich inclusions – the oldest known solid bits in meteorites formed within the solar system – are 4.567 billion years old.[5][6] This gives an age for the solar system and an upper limit for the age of Earth.

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