Vocabulary 1.6 Volcanoes 1.Volcano: A weak spot in the crust where magma has come to the surface. 2.Hot Spot: An area where magma from deep within the.

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Presentation transcript:

Vocabulary 1.6 Volcanoes 1.Volcano: A weak spot in the crust where magma has come to the surface. 2.Hot Spot: An area where magma from deep within the the mantle melts through the crust above it. 3.Magma Chamber: The pocket beneath a volcano where magma collects.

4. Crater: A bowl-shaped area that forms around a volcano’s central opening. 5. vent: The opening through which molten rock and gas leave a volcano. 6.Pahoehoe: A hot, fast moving type of lava that hardens to form smooth, ropelike coils.

7. Aa: A slow moving type of lava that hardens to form rough chunks; cooler than pahoehoe. 8. Active: Said of a volcano that is erupting or has shown signs of erupting in the near future.

9. dormant: Said of a volcano that does not show signs of erupting in the near future. 10. extinct: Said of a volcano that is unlikely to erupt again. 11. cinder cone: a steep cone-shaped hill or mountain made of volcanic ash, cinders, and bombs piled up around a volcano’s opening.

12. shield volcano: A wide, gently sloping mountain made of layers of lava and formed by quiet eruptions. 13. composite volcano: A tall, cone- shaped mountain in which layers of lava alternate with layers of ash and other volcanic material.