Multiple choice

Shield volcano is mainly made up of

  1. basalt

  2. salt

  3. mercury and copper

  4. gasoline
Reveal answer Fill a bubble to check yourself
A Correct answer
Explanation

Shield volcanoes are built almost exclusively of basalt, a type of volcanic rock that forms from low-viscosity lava flows. This lava can travel long distances before cooling, creating the broad, gently sloping shield shape. Other options are incorrect: salt is not volcanic, mercury and copper are individual metals not found in volcanoes, and gasoline is a refined petroleum product.

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