scie rev
what are the layers that make up the lithosphere of the earth?
crust and upper mantle
what makes oceanic crust subducts?
because it's denser
name the 3 types of plate boundaries
transform, divergent, convergent
if i see folded mountains, i am probably near?
convergent boundary
folded mountains are created when two plates collide_?
continental-continental
rift valleys are caused by?
divergent boundary
what causes the continental plates to move?
convection current
what happens when plates rub past each other and cause friction?
earthquake
san andreas fault is an example of?
transform
what is the slowest but the most destructive type of wave?
surface wave
how was the Philippine plate formed?
by oceaning-oceaning convergent boundary
how are active volcanoes, earthquake, epicenter and mountain ranges distributed on the earth's surface?
concentrated in narrow zones
what method is used in locating the epicenter?
triangulation method
and s wave shadow zone is formed as seismic waves travel through the earths body, what does the shadow zone indicate?
the outer core is liquid
which waves travel through the earths layer?
seismic waves
why are there no p waves or s waves received in the shadow zone?
p waves are refracted and s waves are absorbed
youngest pqrt of ocean floor is found in?
ocean ridges
underwater chain is called?
ocean ridge
the magma that creates a new sea floor comes from?
asthenosphere
the mid ocean ridge is the tallest?
no
the east african is an example of?
divergent
the southern part of the supercontinent is called?
gondwana
northern part is called?
laurasia?