Science
pangea meaning in greek
all the land
part of mantle that can bend like plastic
asthenosphere
scientists believe that lithospheric plates move because of
convection currents
boundary where 2 plates collide
convergent
the andes mountains were generated at a _ boundary
convergent (con-con)
the himilayan mountains were formed because of a
convergent boundary
the place where two plates collide if called a
convergent boundary
deepest part of ocean
deep ocean trenches
a change in a rocks shape or volume is called _, which is caused by stress as the plates push, pull, twist, and bend the lithosphere
deformation
a measure of how much mass there is in a volume of a substance
density
a boundary where 2 plates move away from each other
divergent
the place where 2 plates move apart is called a
divergent boundary
volcanoes are most likely to occur along a
divergent boundary
the mid ocean ridge occurs along a
divergent boundary where crust is subducted
where the lithosphere breaks a fault forms. when the rock along the fault breaks and slides what occurs
earthquake
what produces seismic waves
earthquakes
the older the sea floor, the _ it will be from the new sea floor
farther away
pressure is more in the
inner core
the thickness of ocean sediments that are close to a mid ocean ridge is _ the thickness of ocean sediments that are far from mid ocean ridges
less than
oceanic crust cools and becomes more dense as it moves away from
mid ocean ridge
what 2 topographic features of the ocean floor were discovered only with the use of sonar
mid ocean ridges and deep sea trenches
folding and faulting driven by plate movement result in _ building
mountain
when 2 continental plates collide along a convergent boundary what type of landform is created as the plates crash head on and squeeze together
mountains
how do plates move along a divergent boundary
move apart from each other
core is composed of
nickel and iron
volcanic island arcs are associated with
ocean-ocean convergent boundaries
the 2 types of crust are
oceanic and continental
subduction is when
one plate slides under another
began to break apart 225 million yrs ago
pangea
what theory explains the formation, movement, and subduction of the earths plates
plate techtonics
difference b/t inner earth and crust
pressure and temp decreases
when 2 continental plates pull apart a _ forms
rift valley
what causes sea floor to spread
rising molten magma
harry hess created the theory of
sea floor spreading
the process that continually adds new crust is
sea floor spreading
how can we study the core of the earth
seismic waves
what are the 3 types of faults
strike slip, normal, reverse
_ occurs when the land surface sinks as a result of human activities
subsidense
difference of oceanic crust than con. crust
thinner, denser
boundary where 2 plates slip past each other
transform
where 2 plates rub past each other in opposite directions is a
transform boundary
where 2 plates slip past each other and move in opposite directions is called what type of boundary
transformed
when one ocean plate collides with another the subduction forms a
trench
_ theorized that there was a supercontinent named pangea
wegener
a map of global earthquakes and volcanoes tells you
where the plate boundaries are
rocks close to mid ocean ridges are _ rocks far from mid ocean ridges
younger than