alleryStart learning →Active rifts separate at an average rate of about:
A5 m a year
B5 km a year
C5 mm a decade
D5 cm a year
Answer & Solution
Correct answer: D. 5 cm a year
1. The movement is slow but steady.
2. It is comparable to fingernail growth.
3. It is about 5 centimetres a year.
_Source: OpenStax Astronomy 2e, Chapter 8, Earth as a Planet._
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