Section 1: Volcanoes and Plate Tectonics
What is a weak spot in the crust where molten material, or magma, comes to the surface?
Volcano
For 800 points, label the inside of a volcano using the diagram from 3.2 notes.
Check pg. 95
When thin layers of lava pour out of a vent and harden on top of pervious layers. This gradually builds a wide, gently sloping mountain called what?
Shield Volcano
Name 3 planets or moons that have volcanic activity (not Earth)
Mars, Venus, Io (other answers acceptable)
What is a molten mixture of rock-forming substances, gases, and water from the mantle?
Magma
What are the two types of volcanic eruptions?
Quiet and explosive.
A steep, cone-shaped hill or mountain. It may produce as, cinders, or bombs that pile up around the vent in a steep cone-shaped pile.
Cinder Cone Volcano
What is it called when magma reaches the surface?
Lava
What are the 3 stages of a volcano?
Active, dormant, and extinct
Tall, cone-shaped mountains in which layers of lava alternate with layers of ash.
Composite Volcano
What is an area where magma from deep within the mantle melts through the crust like a blow torch?
Hot spot
The huge hole left by the collapse of a volcanic mountain.
Caldera
A mass of rock formed when a large body of magma cools inside the crust.
Batholiths