waves that produce when earthquakes occur
results from a force pressing on an area
the layer of rock that forms Earth's outer skin
a dark rock with a fine texture
usually a light colored rock with a course texture
a layer of hot, solid rock that is about 40 kilometers beneath the surface
the uppermost part of the mantle and the crust that is rigid
a soft layer of earth that is solid, but bendable
a layer of molten metal that surrounds the inner core
a dense ball of solid metal
The transfer of energy through space
heat transfer within a material or between materials that are touching
heat transfer by the movement of currents within a fluid
a mesure of how much mass there is in a volumeof a substance
the flow that transfers heat within a fluid
Alfred Wegener's theory that the continents slowlymoved over Earth's surface
According to alfred, the continents drifted together to form this supercontinent
any trace of an ancient organism that has been preserved in rock
they wind beneath earth's oceans
a device that bounces sound wavesoff underwater objects and then records the echoesof these sound waves
sea- floor spreading
the sea floor spreads along both sides of the mid-ocean ridge as new crust is added
the oceanic crust bends downward
the process by which ocean floor sinks beneath a deep-ocean trench and back into the mantle
according to J. Tuzo Wilson, the lithosphere is broken into sections called plates
a well tested concept that explains a wide range of observations
this states that pieces of Earth's lithosphere are in slow, constant motion
breaks in eath's crust where rocks have slipped past eachother
the place where two plates move apart
forms along the divergent boundary
the place where two plates come together
a place where two plates slip past eachother
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