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Plate Tectonics

Teacher: Ms.Austin
Across
scientist who studiesearthquakes and seismic waves
surface along which rocks break and move
Energy waves that travel outward from the earthquake's focus
location in the mantle that is hotter than any other areas and that melts rock, which is forced up toward the crust as magma
Largest layer inside Earth
single large landmass made up of all the continents connected together that broke apart 200 million years ago
Outer most layer
Liquid surrounding the inner core
rigid, outermost layer of Earth that is about 100km thick, and is composed of the crust and part of the upper mantle
theory that Earth's crust and upper mantle are broken into sections that move around on a plastic-like layer of the mantle
powerful seismic sea wave that can travel thousands of kilometers in all directions and that begins over an earthquake focus
intrusive igneous rock body formed when magma is squeezed into a horizontal crack that cuts across rock layers and hardens
an opening on Earth's surface where magma is forced up and flows out as lava
Down
opening in Earth's surface that often forms a mountain when layers of lava and volcanic ash erupt and build up
Device used to record primary, secondary, surface waves from earthquake
Very dense ball, solid center
fossils that form when some or all of the original materials that made up the organisms are replaced with minerals
plastic-like layer below the lithosphere
hypothesis proposed by Alfred Wegener that the states that continents have moved slowly to their current locations on Earth
a broad volcano with gently sloping sides