Seismic Waves
Plate Tectonics
Random
Random
100
What do seismographs detect?
Seismic Waves
100
What commonly happens when two continental plates collide with each other?
Mountain building. 
100
Scientists use fossil evidence along with rock and climate data to support this major scientific theory.
The theory of plate tectonics
100
When oceanic crust is forced beneath continental crust, this process occurs.
Subduction
200
Draw the and label the main 4 layers of the earths interior.
200
What is the process that drives plate tectonics? Draw a picture of this process.
Convection in the Mantle. 
200
This supercontinent explains why similar fossils are found on different continents today.
Pangea
200
New ocean crust is created by this process
Sea-Floor Spreading
300
What is happening to the S (secondary) Wave between 2700km and 4900km deep? 
The S-Wave is unable to pass through that layer of the earth, which is the outer core.
300
Draw a divergent boundary at a mid-ocean ridge.
300
If identical plant fossils are found on multiple continents, scientists infer this about those continents in the past.
They were once connected
300
Heat from Earth’s core causes this type of current in the mantle.
Convection Currents
400
Why do both P and S Waves change speed as they travel through the earths core?
The waves changes speed as they pass through different layers of the earths interior because the different layers have variable densities (mediums).
400
Explain what is happening in these images. 
Mid-ocean ridge - divergent boundary - magma rising up from the mantle - continental drift.
400
These deep ocean features form at subduction zones.
Ocean Trenches
400
This soft, plastic-like layer of the mantle flows slowly and allows plates to move above it.
Asthenosphere
500
How do scientists use seismic data to model Earth’s layers?
What is by measuring the speed and path of waves through different materials
500
How does plate tectonics explain the distribution of similar fossils on different continents?
What is the continents were once connected (continental drift)
500
These often form along convergent boundaries where one plate sinks beneath another (subduction).
Volcanoes
500
Convection in the asthenosphere causes this layer above it to move.
The Lithosphere