Show:
Plate Boundaries
Theories
Volcanoes and Earthquakes
Seafloor Spreading
New Landforms
100
Plate boundary that occurs when two plates slide past eachother.
What is transform
100
The hypothesis that continents move slowly
What is continental drift
100
the type of boundaries that earthquakes occur along
What are convergent, divergent, and transform
100
new seafloor is created here
What is a mid-ocean ridge
100
The collision of one continental plate with another will produce:
What are mountains
200
a place where two plates move together
What is convergent
200
The theory that all continents might have been conected in one large landmass.
What is Pangaea
200
an instrument that records seismic waves
What is a seismograph
200
this type of rock is located closest to the ridge
What is youngest
200
When two plates are diverging this is created.
What is a rift valley
300
boundary between two plates moving apart
What is divergent boundary
300
Harry Hess's theory that molten pieces of mantle are creating new crust on the ocean floor.
What is seafloor spreading
300
Volcanoes cannot form on a continent to continent convergent boundary because this does not occur
What is subduction
300
as new rock is formed the old rock moves ________ from the ridge.
What is away
300
These can only form when subduction of a plate occurs, or along hotspots.
What are volcanoes
400
an area where an oceanic plate goes down into the mantle
What is subduction zone
400
sections of Earth's crust and upper mantle
What are plates
400
the largest type of volcano
What is a shield volcano
400
the center of the mid- ocean ridge is called a _______ another word for a crack or crevice.
What is a rift.
400
When a continental and oceanic plate collide they volcanoes and ________________.
What are trenches
500
a boundary type that neither creates or destroys crust
What is transform
500
The cycle of heating, rising, sinking, and cooling that may explain why the plates move
What are convection currents
500
a building that is able to withstand the vibrations of an earthquake
What is seismic safe
500
This is forced up at the mid-ocean ridge and slowly cools to produce new rock.
What is magma
500
New crust is formed at a ____________________.
What is a mid-ocean ridge.