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Volcanoes Earthquakes Plate Tectonics Crossword Puzzle

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Volcanoes Earthquakes Plate Tectonics



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Across Down
3 the very middle layer of the Earth
6 a minor earthquake that occurs after the major one
7 the crust and the upper part of the mantle; is rigid
8 an instrument that detects and records earthquake waves
9 a mound of rock on Earth's surface that erupts lava
10 waves of energy that travel through the core of the earth
13 transfer of thermal energy by heated substances
14 the measure of the amount of shaking produced by an earthquake
15 a boundary where two plates are moving towards each other
18 when a plate sinks under another plate and into the mantle
20 hot liquid rock that comes out of a volcano
21 the measure of the amount of energy released by an earthquake
22 short for Mohorovicic discontinuity; boundary between the crust and the mantle
1 a boundary between two plates that are moving apart
2 the point on the Earth's surface directly above the point where an earthquake occurs
4 magma with a relatively high sillica content; is thick, light-colored, and slow moving
5 the layer of Earth found between the core and crust
6 the liquid part of the upper mantle; goes to a depth of 350 km below the surface
11 an intense shaking of the earth's crust caused by the release of energy
12 magma with relatively low silica content; is thin, dark-colored, and flows quickly
15 Earth's outer shell
16 the measure of how thick a liquid is
17 a place on the middle of a plate where volcanism occurs; occurs over hot mantle plumes
19 a boundary where two plates are sliding horizontally past each other
21 lava that is underground
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