Earth originated approximately

Options

(a) 4,500 million years ago
(b) 3,600 million years ago
(c) between 1,600 – 2,600 million years ago
(d) 2.5 million years ago

Correct Answer:

4,500 million years ago

Explanation:

The earth is believed to be originated about 4,500 million years ago (in precambrian Era). Earlier earth’s surface was too hot (about 1000⁰ C). At this temperature life was not possible and water molecules existed in vapour form. It took a long time to cool down the earth. About 3500 million years ago the earth surface become cool enough to hold water and the large water bodies or first ocean came into existence. It marked the beginning of first life on the earth. Water is most essential factor for origin of life.