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earthquake/volcanos

QuestionAnswer
What is a volcano? A weak spot in the Earth's crust where molten material, or magma , comes to the surface
Where do MOST volcanoes occur? Along diverging plate boundaries
What is a hot spot? An area where magma from deep within the mantle melts through the crust like a blow torch
What is the ring of fire? A major volcano belt located on the rim of the Pacific ocean
How many active volcanoes are there on land, and are there more on land or under water? There are about 600 active volcanoes on land, and there are many more underwater
What is lava? Magma that has reached the surface
What is magma? It is extremely hot, molten material that contains dissolved gases
What is a magma chamber? As magma rises toward the surface , it forms a large underground pocket
What is lava flow? A river of lava that pours down a volcano and over the land
What is the crater of a volcano? It is where lava is collected in a bowl-shaped area that forms around the volcano's vent
What is a side vent in a volcano? Sometimes magma forces its way out of the side of a volcano
What is a vent in a volcano? The point on the surface where magma leaves the volcano
What is a pipe in a volcano? A narrow, almost vertical crack in the crust that magma rises from
Why do earthquakes occur before and/or during a volcano? Magma moving up the vent inside the volcano cause the rocks to move and shake producing seismic energy.
List the three types of seismic waves in order of speed, fastest to slowest. P – S- L(surface)
What is an earthquake? The shaking by the sudden release of energy
What are the three types of stress? Shearing, compression, and tension
What is shearing? Rocks to move in opposite directions
What is compression? Rocks to push together
What is tension? Rocks to pull apart
What is fault? A break in the Earth's crust along which tectonics plates move in different directions and at different speeds
What is caused by shearing? Strike-slip fault
What is caused by compression? Reverse fault
What is caused by tension? Normal fault
What is deformation? the change in the shape of rock in response to stress
What is an anticline? When rock bends upward
What is a syncline? When rock bends downward
Created by: soccerforlife14