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15 Cards in this Set
- Front
- Back
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What is a volcano
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a weak spot in the crust where magma comes up
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what is molten mixture from the mantle?
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magma
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what is magma when it reaches the surface
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lava
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what is the ring of fire
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a major volcanic belt tha rims the pacific ocean
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where do volcanoes occur
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diverging plate boundaries hot spots and converging boundaries
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how do volcanos form on the mid ocean ridge
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lava pours out of the cracks on the ridge
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where do many volcanos form
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on converging plate boundaries
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how does subduction at converging boundaries lead to the formation of volcanos
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stabs of oceanic crust sink through the trench into the mantle it melts to form magma which comes back up as lava
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when two oceanic plates collide to form a string of islands what are volcanos on these boundaries called
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island arcs
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what are three major island arcs
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japan new zealand and indonesia
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what collided to form the andes mountains called
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a continental plate and an oceanic plate
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what is a hot spot
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where magma melts through the crust
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how did the hawaiian islands form
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the pacific plate floated over a hot spot
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do hot spots only form over oceanic crust
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no
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where does magma form
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in the mantle
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