Inside the Earth
Earthquakes
Plate Tectonics
The Changing Surface
You Should Know
100
The outermost layer of the Earth, made of the crust and upper part of the mantle
What is the LITHOSPHERE?
100
The scientific instrument used to record and track seismic waves.
What is SEISMOGRAPH?
100
The layer of Earth that lithospheric plates float upon.
What is the ASTHENOSPHERE?
100
These are the vibrations that cause earthquakes.
What are SEISMIC WAVES?
100
The thickest of Earth's 2 types of crust.
What is CONTINENTAL?
200
The largest layer of the Earth, 82% of Earth's mass.
What is the MANTLE?
200
The first seismic wave to arrive in an earthquake.
What is P-WAVE?
200
The type of boundary where 2 plates are moving towards each other.
What is CONVERGENT BOUNDARY?
200
This process happens at mid-ocean ridges.
What is SEA-FLOOR SPREADING?
200
The fastest of the 3 seismic waves.
What are P-WAVES?
300
The layer of the Earth with the most density.
What is the CORE?
300
The last seismic wave to arrive in an earthquake.
What is SURFACE WAVE?
300
The type of boundary where 2 plates are sliding past each other.
What is TRANSFORM BOUNDARY?
300
These are the currents of flowing rock within the mantle that move Earth's plates.
What are CONVECTION CURRENTS?
300
The type of boundary that produces the most earthquakes.
What is TRANSFORM BOUNDARY?
400
The outer core is made of this.
What is LIQUID METAL (iron & nickel)?
400
S-waves can NOT travel through this material.
What is LIQUID?
400
Where one plate slides underneath another plate.
What is SUBDUCTION?
400
These geologic features occur at plate boundaries, and can sometimes be seen on the surface.
What are FAULT LINES?
400
The type of rock that makes up OCEANIC crust.
What is BASALT?
500
The lower portion of the mantle.
What is the MESOSPHERE?
500
The area directly above the focus of an earthquake?
What is EPICENTER?
500
The 2 types of crust.
What are OCEANIC and CONTINENTAL?
500
The large landmass in Earth's past where all the continents were joined together.
What is PANGEA?
500
The name of the scientist who came up with the theory of continental drift.
Who is ALFRED WEGENER?
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