The densest compounds that make up the earth are found here.
What is the core
100
The force that occurs when objects are squeezed.
What is compression
100
The point on Earth's surface directly above an earthquakes starting point.
What is the epicenter
100
A volcano that is currently not erupting, but has in the past and may someday erupt again.
What is dormant
100
The name of the single large landmass in the theory of continental drift.
What is Pangaea
200
The middle layer of the Earth.
What is the mantle
200
Type of fault created when the hanging wall moves down relative to the footwall.
What is normal
200
Used to measure the magnitude or strength of an earthquake.
What is the richter scale
200
Type of volcano that has gentle sloping sides, and is built of layers of lava released from repeated non-explosive eruptions.
What is sheild
200
The point inside the Earth where an earthquake begins.
What is the focus
300
Layer composed of the crust and upper portion of the mantle.
What is the lithosphere
300
The type of convergent boundary where subduction zones are created.
What is continental plate vs. ocean plate
300
Minimum number of seismograph station readings needed to determine the epicenter of an earthquake.
What is 3
300
Volcanically active places on Earth that are not near a plate boundary.
What is a hot spot
300
Lava with a _______ viscosity will flow easily.
What is low
400
Plastic like layer of the mantle on which tectonic plates move.
What is the asthenosphere
400
The type of boundary where seafloor spreading occurs.
What is divergent
400
This type of seismic wave is not a body wave, is the most destructive type of wave, and moves both up/down & side to side.
What is a surface wave
400
A large semicircular depression that forms when the roof of a magma chamber collapses.
What is a caldera
400
States that in undisturbed layers of rock, the youngest rocks are on top.
What is the principle of superposition
500
When rock in the mantle is heated, it expands, becomes less dense, and rises. When it cools, it becomes more dense and sinks. This process is called ___________.
What is convection
500
Seismic waves travels through the Earth at different speeds, depending on the _________ and __________ of the material they pass through.
What is density and composition
500
The process of making older structures more earthquake resistant.
What is retrofitting
500
The factors that determine how explosive an eruption is are the amount ________, _________, and __________ in the magma.
What is water
gases
silica
500
The man who proposed the theory of continental drift.