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  #1  
Old 2 April 2011, 05:32
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Default berapakah umur bumi???

KALO REPOST SILAHKAN DIHAPUS OM MOMOD..


Kamu pasti sering merayakan ulang tahun, entah ulang tahun saudara, teman, orang tua atau orang terkasih. Namun, tahukah Kamu usia Bumi tempat kita tinggal?

Pengukuran dilakukan sejak abad ke-18 berdasarkan tingkat pendinginan Bumi. Usia Bumi sangat diremehkan, bahkan banyak yang beranggapan usia Bumi hanya berkisar ratusan ribu tahun saja.

Kemudian, ilmuwan terkenal seperti Charles Darwin menebak usia Bumi. Ia menebak usia bumi adalah 306,7 juta tahun. Selain itu, Lord Kelvin pun membuat beberapa usulan mengenai usia Bumi dalam rentang ratusan juta tahun dan merupakan perbaikan moderat.

Kemampuan secara akurat untuk mengetahui usia Bumi berkembang dengan pemahaman peluruhan radioaktif. Bumi terbentuk dari puing-puing sisa kelahiran matahari. Zat radioaktif melepaskan partikel subatomik pada tingkat yang sangat stabil.

Terkadang usia suatu obyek dapat ditentukan dengan membandingkan tingkat zat radioaktif saat ini dengan jumlah awal yang seharusnya. Uranium merupakan elemen radioaktif alamiah yang sangat dipahami.


Pada 1953 ilmuwan mengukur rasio uranium dalam sampel batuan kuno, dengannya ilmuwan dapat mengetahui usia Bumi yang telah mencapai usia 4,5-4,6 miliar tahun. Estimasi inilah yang hingga kini tetap bertahan.

Sumber : http://www.sofilmendo.com/2011/04/ta...usia-bumi.html
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  #2  
Old 2 April 2011, 06:45
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306,7 juta tahun.
kira2 pada masa itu saya dmn ya ?
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Old 2 April 2011, 07:19
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rokok Jawaban untuk berapakah umur bumi???

Berapakah umur bumi???

TANYA SAJA SAMA EMAKNYA YANG DULU NGELAHIRKEUN...!!!!
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Old 2 April 2011, 08:56
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walah sebuah penelitian dan penemuan yang tentu saja akan banyak menemu kontroversi neh... hanya DIA yang tahu tapi manusis bisa meneliti juga
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Old 2 April 2011, 23:52
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hmm bener juga kita terlalu meremehkan umur bumi
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Old 2 April 2011, 23:59
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yang jelas umur bumi semakin menua...
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Old 3 April 2011, 01:35
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bingung jawabnya
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Old 3 April 2011, 06:02
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Quote:
Originally Posted by bayu ninja View Post
kira2 pada masa itu saya dmn ya ?
masiy di pohon lu gan ..
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Old 5 April 2011, 08:09
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Quote:
Originally Posted by haydar View Post
Berapakah umur bumi???

TANYA SAJA SAMA EMAKNYA YANG DULU NGELAHIRKEUN...!!!!
hahaha,, emaknya kan udah bobok
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  #10  
Old 6 April 2011, 13:41
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yang jelas umur bumi semakin menua...
sipp bro...
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