Show:
Earth's layers
Earthquakes
Volcanoes
Earth's Moving Crust
Miscellaneous
100
what is the top layer of the earth?
The crust
100
Earthquakes are strongest at?
the fault line
100
what is the top part of a volcano called 
A crater
100
What did the scientists call their proposed idea to explain seafloor spreading? 
The theory of plate tectonics
100
Which fault moves horizontally? 
Strike-slip faults
200
How thick is the crust?
25 miles
200
What are the three types of earthquake waves?
P-wave, S-wave, L-wave
200

Underwater volcanoes formed what state?

Hawaii
200
what is the idea for continental drift?
at one point in the history of the world, all of the continents were all fit together like pieces of a land mass called Pangaea 
200
why did the theory of Uniformitarianism require long ages for earth's history?
the natural processes have always happened at the same rate.
300
how many layers are there in the earth?
4
300
what effects do earthquakes do to the surface of the earth?
they can open up cracks in the ground and create pits.
300
What are the three types of volcanoes?
Cinder Cone, Composite, Shield
300
describe the evidence used to support the idea of continental drift. 
identical fossils in Africa and south america plus the fact that if you connect certain continents, it will fit together. 
300
What causes plate tectonics to move?
the partly melted mantle moves with the earth's spinning.
400
which layer is solid besides the crust?
The inner core
400
What fault is in California called?

The San Andreas fault

400
Where is a magma chamber located in a volcano?
at the very bottom
400
Define the theory of plate tectonics.
Scientists used the concept of seafloor spreading as the mechanism to explain plate movements. 
400
What two scales are used to measure earthquakes?
the Mercalli scale and the Richter scale
500
What is the upper mantle like?
It is rigid rock
500
What are the three types of faults?
Normal fault, Reverse fault, and strike-slip fault
500
What is a lahar?
A mixture of flowing water, dirt, and rock
500
What are Three pieces of evidence that seafloor spreading exists?
Magnetic reversal, Depth of sediment, Radiometric dating.
500
How did the flood effect the movement of the plates?
it washed them farther apart very quickly.