Layers
Upper most layer
crust
pieces of the earth's crust
plates
_____ volcanoes erupt and form very quickly
cinder cone
What are the two layers of mantle called? How are they different?
upper and lower
upper is solid, lower is weak and plastic
___________ plates move and cause earthquakes
tectonic
lava comes from a single vent and flows out and spreads
shield volcano
What is the geosphere?
all of the rocky material on Earth
this type of plate boundary pulls apart
divergent
a combination of lava flows and cinders erupting from multiple vents
composite volcano
This physical layer includes the crust and upper mantle
lithosphere
plates that push together
convergent
Explain Wegener's theory of continental drift
the continents were first one giant continent and slowly moved apart over time because of tectonic plates spreading
This weak, physical layer is weak and flowing
asthenosphere
__________ boundaries shift horizontally past each other
transform
The process of ___________ taking place in the mantle provides energy to keep plates in motion.
convection