Chapter 25 Flashcards
who came up with the continetal drift hypothesis
Alfred Wegener
what is some evidence for the contential drift
- All the coast lines matched up like puzzle pieces
- moutnains rock were the same with fossils
- same fossils that matched up
what was the name the super-continent called
Pangea
who came up with the sea floor spreading hypothesis
Harrry Hess
how did he discover sea floor spreading
he used sonar
whart did Hess discover using sonar
he discpovered the mid ocean ridge MOR
where are new rocks are formed in the ocean floor
closer to the MOR
where are the types of plate boundary
divregent
convergent
transform
how do conergent plates moves
connect together
what time of boundary will sudcution happen
convergent paltes
what types of crusts are there
continetal and ocean
if conntineal and ocean converge what happens
deeps sea trench and volcanos
whar forms if two ocean plates converge
volcvanic islands
whar forms if two ocean plates converge
volcvanic islands
whar do hot spot create
volcanic isalnd
how do divergent plates move
They go oppisite from eachother
what is example of a divergent plate boundary
east african rift
how do transform plate boundaries move
slide horizontal by eachother
where is the only transform boundary at
san andreas fall
what type if crsut has to be present for a transform plate boundary
only continental
fault
a crack in earths surface
what plate boundaries have have shallow earthquakes
divergent and transform
what plate boundaries have deeper eather quakes
convergent
what are the four types of stress applied on rock
compression
tension
shear
torsion
what are the four types of stress applied on rock
compression
tension
shear
torsion
what are the two types of deformation
elastic and plastic
what happens when elstic deformation occurs
stretches and returns to its place
what happens when plastic deformation occurs
the rock will stay in a new form
how many size seismic waves are there
there is three
primarty
secondary
surface
what are the two types of body waves
primary waves and secondary waves
what type of wave is a primary wave
compression
what kind of material move thorugh p waves
sold and liquids
what kind of material do secondary waves move through
only solids
what kind of material do secondary waves move through
only solids
what is the most complex wave
surface
what does the rector scalem measure
the mout of eneerguy realeased
whatr does the mercalli scale measured
the amount of damaged
