What is the evidence that the age of Venus' surface is about 500 million years old?
A) the number of large craters
B) the radioactive age of Venus rocks
C) it has some tectonic activity
D) from fossils
E) the amount of volcanic activity

What is the evidence that the age of Venus' surface is about 500
million years old?

The answer to the question is “A”

Crater Counts as an Age-Determining Mechanism:

“Crater density can tell you how old a surface is. 
More craters means that the surface has been around longer, and has
gotten smacked more.
Fewer craters -- younger surface. 
The fact that Venus' surface has few craters suggests that it is, on
average, only about 500 million years old.
That's pretty young, given that the terrestrial planets have been
around for 4-4.5 billion years.”

Source
Bucknell University : Astronomy 101
http://www.eg.bucknell.edu/physics/astronomy/as101/calpages/30oct02.html

Search Criteria:
evidence age of Venus surface 500 million years old

I hope this help.

Best Regards,
Bobbie7-ga

---

Clarification of Answer by bobbie7-ga on 31 Mar 2003 11:40 PST

The other source is Windows to the Universe, at the University
Corporation for Atmospheric Research (UCAR).
http://www.windows.ucar.edu/tour/link=/venus/interior/V_tectonism.html&edu=high