Civil Services Prep

Prelims MCQ · Geography

Which one of the following correctly describes the terminology used for molten rock associated with the mantle and volcanic eruptions?

  1. Molten material in the upper mantle is called lava, but it becomes magma after reaching the surface.
  2. Magma refers only to volcanic ash and gases, whereas lava originates in the liquid outer core.
  3. Lava is the term used exclusively for molten material that cools within the deeper crust.
  4. Molten material in the upper mantle is called magma; when it moves towards the crust or reaches the surface, it is referred to as lava.
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