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Home Q & A Board Science-Related Homework Help Physics Astronomy
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Tsync Tsync
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8 years ago
The oldest rocks on our crust are radioactively dated at about:
A) 200 million years old.
B) 4.6 billion years old.
C) one billion years old.
D) four billion years old.
E) 2.7 billion years old.
Textbook 
Astronomy Today

Astronomy Today


Edition: 8th
Authors:
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Minoring in physics
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RatatouilleRatatouille
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8 years ago
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Tsync Author
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#2
8 years ago
This astronomy class is killing me, thanks for chiming in and answering
Minoring in physics
wrote...
#3
8 years ago
Cool Smiling Face with Open Mouth
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