Show:
Earthquakes
Earthquakes cont.
Volcanoes
Volcanoes Cont.
100
Faults rub together
Why do earthquakes happen?
100
break in earth's crust
What is a fault?
100
A volcano is a place where gas, ash or melted rock come out of the ground.
What is a volcano?
100
Column where mantle comes out of the ground
What is a hotspot?
200
Ground movements when blocks of rock move suddenly
What is an earthquake?
200
process by which rock becomes deformed
What is deformation?
200
melted rock
What is magma?
200
Flattened, and cooled lava
What is a plateau
300
Place where an earthquake first hapens
What is a focus?
300
Return of rock back to its original state
What is elastic rebound?
300
magma that reached the surface
What is lava?
300
giant cracks

What is a fissure?

400
directly above the focus
What is an epicenter?
400
about 500,000
How many earthquakes are detected each year?
400
lava and clouds come out of here
What is a vent?
400
A depression in the top of a volcano
What is a volcanic crater?
500
two or more plates meet
What are tectonic plate boundaries?
500
Tsunamis
What are the potential dangers of earthquakes?
500
giant sections of the lithosphere
What are tectonic plates?
500
an empty chamber due to magma drain
What is a caldera?