Multiple choice

What type of rock makes up the oceanic crust?

  1. limestone

  2. magnesium

  3. basalt

  4. nickel
Reveal answer Fill a bubble to check yourself
C Correct answer
Explanation

Oceanic crust is primarily composed of basalt, which is a dark, fine-grained igneous rock. Other options like limestone are sedimentary rocks, while magnesium and nickel are chemical elements rather than rock types.

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