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Earth
Earthquake I
EarthquakeII
Vocanoes
Random
100
The most abundant element in the earth's crust.
What is Oxygen?
100
Where are the effects of an earthquake most severe?
What is the Epicenter?
100
A large well-known strike-slip fault in western California.
What is the San Andreas Fault?
100
An inactive volcano that can errupt again.
What is Dormant.
100
The bending or buckling of rocks under great force produces a...
What is fold?
200
The inner core of the earth is thought to be...
What is Solid?
200
An instrument used to record the vibrations caused by earthquakes.
What is a Seismograph?
200
The most famous scale of earthquake strength, which rates earthquakes on a scale of 1 to 10.
What is the Richter scale?
200
Type of volcano consisting primarily of erupted volcanis ash and rock fragments held loosely together.
What is a Cinder-cone volcano?
200
The study of earthquakes
What is a Seismology?
300
The middle of the earth's three main layers.
What is the Mantle?
300
About 80% of the world's earthquake occur in...
What is the Pacific Archipelago?
300
An earthquake caused by sudden movements of rock beneath the earth's surface.
What is Tectonic Earthquake?
300
A domelike igneous intrusion formed when magma bulges overlying rocks upward.
What is Laccolith?
300
Deposites of sand and mineral fragments, usually laid down by water.
What are Sediments?
400
All the present-day continents are thought to have been on land mass called...
What is Pangaea?
400
The point deep in the earth at which an earthquake begins
What is the Focus?
400
Theory that states that rocks spring back to a position of little or no strain at the moment of an earthquake, causing vibrations in the earth's crust
What is The Elastic Rebound Theory?
400
Large almond- or teardrom-shaped pieces of ejecta formed when lava solidifies.
What is a Volcanic bomb?
400
The archlike structure formed when rocks are folded upward.
What is an Anticline?
500
The boundary line between the crust and the mantle
What is Mohorovicic discontinuity (Moho)?
500
The narrow zone of active volcanoes that nearly encircles the Pacific basin.
What is the Ring of Fire?
500
The fastest type of earthquake waves.
What are the P Waves?
500
A bowl-shaped hollow more than 2 miles wide, formed by the collapse of an underground magma chamber.
What is Caldera?
500
In what kind of fault do rocks along one side of the fault sink vertically?
What is a Normal fault?