Question

1. match the words with the descriptions.

molten magma that reaches the earths surface
viscosity
a point where the mantle is superheated
vent
lava
an opening in the earths surface through which volcanic material is ejected
hot spot
resistance of a substance to flowing
cone
powdered rock emitted by a volcano
ash
the hill - shaped landform that builds up around a volcano

Explanation:

• viscosity: It is the resistance of a substance to flowing.
• vent: An opening in the earth's surface through which volcanic material is ejected.
• lava: Molten magma that reaches the earth's surface.
• hot spot: A point where the mantle is superheated.
• cone: The hill - shaped landform that builds up around a volcano.
• ash: Powdered rock emitted by a volcano.

Answer:

viscosity - resistance of a substance to flowing; vent - an opening in the earth's surface through which volcanic material is ejected; lava - molten magma that reaches the earth's surface; hot spot - a point where the mantle is superheated; cone - the hill - shaped landform that builds up around a volcano; ash - powdered rock emitted by a volcano.