Changing Earth Ch. 1 Review
Who am I?
I’m an area of volcanic activity
that develops above rising plumes
of magma.
 Hot spot
I’m the huge underwater mountain
ranges that are present in every
ocean and circle the earth.
 mid-ocean ridges
I’m one plate sinking beneath
another.
 Subduction
I state that Earth’s lithosphere is
broken into huge, moving slabs of
rock driven by motions in the
mantle.
 Theory of plate tectonics
I’m the name that Alfred Wegener
gave to the huge supercontinent
that he proposed had once
existed.
 Pangaea
I’m the place where older crust is
destroyed because two plates
converge, or push together
 Convergent boundary
I occur where two plates move
past each other in opposite
directions.
 Transform boundary
I’m the hypothesis that proposed
that Earth’s continents were once
joined in a single landmass and
then gradually moved apart
 Continental drift
I’m the layer of hotter, softer rock
in the upper mantle.
 Asthenosphere
I’m a plate with oceanic crust
sinking under a plate with
continental crust.
 Oceanic -continental subduction
I’m the layer of liquid metals that
surrounds the inner core.
 Outer core
I’m the motion created when
heated material continually rises,
cools, and sinks.
 Convection current
I’m the thin layer of rock that
surrounds the Earth.
 Crust
I’m the gap that forms as tectonic
plates move apart
 Rift valley
I am the layer at the center of the
Earth.
 Inner core
I am the three pieces of evidence
that proved Wegener’s
Continental Drift theory to be
correct.
 Fossils, climate and geography
I am the main driving force of
plate tectonics.
 convection in the astenosphere
I am the part of the Earth that
makes up a tectonic plate
 crust and upper most mantle
I am a boundary that is also
known as a spreading center.
 Divergent boundary
I am the pattern formed by
magnetic minerals at a mid-ocean
ridge.
 Same on either side of the ridge
I was formed after a continentalcontinental collision of the
African and European plates.
 The Alps
Hint:
 How do the studies of the ocean
floor- and everything that is
happening there- help explain
the theory of plate tectonics?