2006-06-26 22:44:32 · 5 answers · asked by athernadeem q 1 in Science & Mathematics ➔ Earth Sciences & Geology
Geologists have determined the age of the Earth to be around 4.55 billion years. This age represents a compromise between the oldest-known terrestrial minerals – small crystals of zircon from the Jack Hills of Western Australia – and astronomers' and planetologists' determinations of the age of the solar system based in part on radiometric age dating of meteorite material and lunar samples.
The radiometric age dating evidence from the zircons further confirms that the Earth is at least 4.404 billion years old. Comparing the mass and luminosity of the Sun to the multitudes of other stars, it appears that the solar system cannot be much older than those rocks.
http://en.wikipedia.org/wiki/Age_of_the_Earth
2006-06-26 22:49:58 · answer #1 · answered by Prakash 3 · 0⤊ 0⤋
scientists calculated the earth age through HALF-LIFE.
2006-06-27 06:08:51 · answer #2 · answered by ashoneza 1 · 0⤊ 0⤋
we know various isotopes of carbon having radioactive in nature and we also know the exact half time of all the isotopes. scientist find outs the decay level of this isotopes and find out the age of earth.
2006-06-27 05:52:20 · answer #3 · answered by Arif V 1 · 0⤊ 0⤋
Only Estimation by the Radioactive materials.
2006-06-27 09:05:48 · answer #4 · answered by JAMES 4 · 0⤊ 0⤋
by radioactive carbon dating
2006-06-27 05:48:38 · answer #5 · answered by agnostik_one 1 · 0⤊ 0⤋