Quizlet

Flashcards: Science,Earthquakes and Tsunamis

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The 3 Types of plate movementExtentional,Compressional,and Transform
ExtentionalTwo plates pushing away from each other
CompressionalTwo plates pulling towards each other
TransformTwo plates going the oppostie way
PlateA large rigid slab of rock
PangeaA super continent
How many plates are there?10 major ones and many small ones
How long is it to get to the center of earth?6,000km (60,000m)
the 3 types of seismic wavesP waves (primary waves), S waves (secondary waves), and surface waves
Primary wavesThey are the strongest type of waves, and they are most dangerous and they move rock.
Secondary wavesThese waves are slow, and they are near the surface
Surface wavesWaves that are very slow.
SeismographA machine that measures earthquakes
EpicenterThis consists of three seismographs,you need one in different places.You record what you got for all three of them and with computer calculations figure out the center were it came from
TsunamiThey are underwater earthquakes, and can travel to 600 mph, and it can go 400 miles
Richter ScaleA scale that measures earthquakes and tsunamis,it is a machine used around the world
Where are earthquakes the strongest?At the epicenter, if you go farther from the epicenter the earthquake gets weaker.
Earthquake intensitybeside size an earthquake can be compared by intensity
What happens before a tsunami comes?The water line will recede