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Plate Tectonics created by Jayda Lee

Across
One or a series of huge sea waves caused by earthquakes or other large-scale disturbance of the ocean floor.
The system used to measure the strength of an earthquake.
Primary, longitudinal, irrotational, push, pressure, dilatational, compressional, or push-pull wave. The waves carry energy through the Earth as longitudinal waves, moving particles in the same line as the direction of the wave.
The innermost layers of the Earth
Fragments less than 2 millimeters (about 1/8 inch) in diameter of lava or rock blasted into the air by volcanic explosions
The theory that the Earth's crust and upper mantle (the lithosphere) is broken into a number of more or less rigid, but constantly moving, segments or plates.
Sometimes sedimentary and igneous rocks are subject to pressures so intense or heat so high that they are completely changed.
earthquake which follows a larger earthquake
Dark-colored, low-silica (less than 53 percent SiO2), low viscosity volcanic rock that is relatively fluid when molten
The area of the Earth through which faulting occurred during an earthquake.
seismic wave that can travel through the interior of the earth
Down
A vent (opening) in the surface of the Earth through which magma erupts; it is also the landform that is constructed by the erupted material.
It has long gentle slopes produced by multiple eruptions of fluid lava flows. It resembles an inverted warrior's shield.
region in which earthquakes are known to occur.
The layer of rock that lies between the crust and the outer core of the Earth. It is approximately 2900 kilometers thick and is the largest of the Earth's major layers.
The theory, first advanced by Alfred Wegener, that Earth's continents were originally one land mass.
steep-sided volcano formed by the explosive eruption of cinders that form around a vent
Shear, secondary, rotational, tangential, equivoluminal, distortional, transverse, or shake wave. These waves carry energy through the Earth in very complex patterns of transverse (crosswise) waves.
maximum height of a wave crest or depth of a trough
The thin outer layer of the Earth's surface, averaging about 10 kilometers thick under the oceans and up tp about 50 kilometers thick on the continents.