Page 105 - Science Course 2 (Book 2)

Mo10-L4b: What are Volcanoes?

Let’s Begin
Mo10-L4b What are Volcanoes?

KEY CONCEPTS: Volcanoes
1. Where do most volcanoes form?
Volcanoes are vents in Earth’s crust through which
molten rock f ows.
Vocabulary A-Z

Let us learn some vocabulary

Lava
Volcano

Geologists call molten rock
stored beneath Earth’s
surface magma.
magma
Lava is magma that erupts
onto Earth’s surface.
magma
molten rock stored below Earth’s surface.

volcano

a vent in Earth’s crust through which molten rock
f ows.
Most volcanoes form at convergent plate
boundaries.
lava

magma that erupts onto Earth’s surface. A line of volcanoes forms parallel to the plate
boundary directly above the plate that subducted.

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