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Layers of the Earth

TermDefinition
crust Earth's thin outer layer, composed of sand, and rock, least dense material
mantle thick liquid made of rock, magma, just under earth’s crust, where convection currents rise and fall moves earth’s plates
outer core A layer of molten iron and nickel that surrounds the inner core of Earth
inner core A dense sphere of solid iron and nickel at the center of Earth that is as hot as the surface of the sun.
tectonic plate Sections of the Earth's crust that move due to convection currents.
continental plates Tectonic plates including land
oceanic plates plates that form the floor of the ocean
subduction Process in which one plate moves under another plate, and into the mantle, takes place at a convergent boundary.
mountains Formed by two continental plates colliding and forcing each other upwards.
earthquakes A sudden and violent shaking of the ground, sometimes causing great destruction, as a result of movements within the earth's crust or volcanic action
primary waves A longitudinal body wave; travels through solids, liquids, and gases and is the fastest seismic wave, first recorded during an earthquake
secondary waves waves that travel outward from an earthquake's focus and move through Earth by causing particles in rocks to vibrate at right angles to the direction of the wave
surface wave travels across the surface of the Earth as opposed to through it, slowest moving seismic wave, but caused the most danger.
Created by: casmith19