earths layers Flashcards
what are the mechanical layers?
lithosphere, asthenosphere. mesosphere,outer core, inner core
what are the compositional layers?
crust , mantle core
what are the two crust
Continental, oceanic
which crust is thicker and less dense
continental
which crust is thinner and more dense?
oceanic
which layer is sludgy like ooblek or toothpaste?
Asthenosphere
which core is ligiud
outer
which core is solid
inner
which waves are seismic
p and s waves
which wave goes though all mediums
p
which wave is longitudinal
p
large shadow zone
s
less damage
p
how does studying how waves move help scientists
They learn more about the interior of Earth
who discovered continental drift
wegner
what is a pangea
when all the continents were connected
how do we know alll of the continents were connected
fossils of plats and animals on different continents
what are convection cells
rising and sinking of hot magma
what are the plate boundaries
convergent, transform,divergent
where do mid ocean ridges form
divergent
where is seafloor spreading
divergent
most common reason for earthquake because of plates getting stuck
transform
where do 2 plates collide
convergent
which boundaries creates volcanoes and mountain and trenches
convergent
when does subduction happen
when earth recycles itself
3 facts about Marian trench
crescent shape 7 miles at deepest point, challenger deep
most powerful force on earth
tectonic plates moving
who discovered seafloor spreading
Henry Hess
which mt range is rounded and 2000 miles long
appalachian
which mountain range is jagged and tallest peak over 14000 ft
rocky
which mt is in Asia where the Indian and Eurasian plates crashed
Himalayas
plates releasing stress and energy in the rocks is what?
an earthquake
80% are found in the ring of fire
earthquakes
75% found in the ring of fire
volcanoes
what is the inner core made of
iron and nickle
loudest sound in history
the krakatoa
transform
rubbing against each other
convergent ocean to ocean
subduction
convergent continent to continent
hit each other
divergent
move away from each other
about ___ of all earthquakes strike around the _________
90% and pacific ocean basin
in japan quakes are caused by ____ to ____ convergence
ocean, ocean
what did new Madrid fault form ?
reelfoot lake
how fast is the pyroclatic flow
100-400km/hr
______ will decrease melting point in the mantle
water
which MT has wildfires
rocky
shock wave from final explosion traveled the world __ time in __ days
7 , 5
which crust will subduct under continental crust and younger ocean crust
ocieanic
most common reason for earthquakes
transform
most common reason for earthquakes
transform
s waves shadow zone
104
p waves shadow zone
40
which waves bends when moving around layers
p
what are 3 ways mantle rocks melt
temp rises, pressure lowers, add water
common places for volcanoes
Alaska, Hawaii, Iceland, central america
