We Normally Determine the Relative Ages of Planetary Surfaces by Counting

question 274

Multiple Choice

We normally determine the relative ages of planetary surfaces by counting craters.This technique works for some of Jupiter's Galilean moons but not for others.Where can we use it?

• A) all except Io
• B) Ganymede and Callisto
• C) only Ganymede
• D) only Callisto

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