Continental Drift
This large supercontinent
Pangaea
The crust is made of
plates that float on the asthenosphere
shield volcanoes are what
Earth is compromised of how many layers
Four
granitic magma is thick and
traps gas bubbles
The inner core made of this
solid iron and nickel
The magma causes what type of current
convention
shield volcanoes have what type of slope
gentle
35 km to 100 km thick, commonly called the Earth’s crust
Lithosphere
when magma reaches surface its called
lava
First man credited with the theory of the continental drift
Alfred Wegener
The margin is found at the edge of the continent made up of
shelf, slope, and rise
volcanic features are
vent, crater, and caldera
Why is the inner core solid and the outer core liquid
Pressure
tephra is
solid material that is ejected from the volcano
When two ocean plates come together one slides down forming a
subduction zone
plates meet at the edge of a continent
strato or composite are built by
violent eruptions of volcanic fragments and lava
The mantle is made of
iron and silica
the finest material is called
volcanic ash
Molten rock beneath the surface
magma
plate boundaries they come together forming a
convergent boundary
cinder cone volcanoes built by
accumulation of tephra
In the mantle, the rock acts like what
a fluid called plastic rock
lapili is
a pebble size material