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Name this Plate Boundary

Divergent Plate Boundary

Name the giant underwater mountain chain that is shown below

Mid Ocean Ridge or MOR

Name the Plate Boundary Shown Below

Convergent Plate Boundary

Here we see two plates sliding past each other Here we see two plates sliding past each other. Name the Plate Boundary:

Transform Plate Boundary

When two plates are colliding, what factor determines which plate will be pushed under the other?

Density

Who came up with the idea that all the continents were once one giant continent (Pangaea)?

Alfred Wegner

Stress that pushes a rock together until it folds or breaks

Compression

Stress that pulls a rock apart

Tension

This is the layer of the earth where convection currents occur.

The Asthenosphere

How would you describe the age of rocks at the MOR?

They are they youngest rocks in the oceans because new rock is created at the MOR

What type of plate boundary deals with sea floor spreading?

Divergent plate boundary

What does the mercalli measure

It measures the intensity of an earthquake

Name the most destructive of all waves?

R Waves

How do you use the mercalli scale?

You observe the destruction the earthquake causes You observe the destruction the earthquake causes. Anyone can use the Mercalli scale.

How does the San Andreas Fault work How does the San Andreas Fault work? (include the names of the plates involved!)

The Pacific plate slides northwest against the North American Plate

Name the two types of crust

Oceanic and Continental

What does the Richter Scale measure

It measures the magnitude of the earthquake using a seismograph

What is strain?

The permanent change in shape of a rock

Define focus

The place inside the earth where the earthquake occurs

Name the place on the surface of the earth directly above the focus

The epicenter

These type of waves can travel through solids and liquids and are the fastest moving seismic waves

P Waves

This Country is located directly on the MOR

Iceland

This type of wave travels only through solids This type of wave travels only through solids. It is the second fastest wave.

S Waves

These waves look like an S-wave on it’s side

L Waves

How are mountains formed

Mountains are formed when 2 continental plates meet at a convergent boundary. The rocks push together and make mountains