What might explain how the core formed?
A) asteroids hitting and penetrating
B) iron sinking to the core as the bulk of Earth melted
C) the magnetic field pulling it inward
D) Earthquakes shake the planet and the iron gradually "sifts" downward
E) The silicon of the crust decays into iron at high temperatures
Correct Answer:
Verified
Q30: How do we know Earth has a
Q31: Why is the inner core solid even
Q32: Why do we believe Earth has an
Q33: About how hot is the core of
Q34: The interior of Earth is very hot
Q36: Why is the core hot?
A) from the
Q37: Carbon-13 is a radioactive isotope. About half
Q38: How is the age of a rock
Q39: Suppose that we have a sample of
Q40: How is the age of Earth measured?
A)
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