This is the name of the man who hypothesized that all the continents were once joined together.
Who is Alfred Wegener?
100
This is a long, continuous mountain range that forms where new crust is being created.
What is the mid-ocean ridge?
100
Where two tectonic plates slide past eachother horizontally.
What is a transform boundary?
100
This is a large chunk of the earth's crust.
What is a tectonic plate?
100
This is the reason no one accepted Wegener's theory.
What is the lack of an explanation how the continents moved?
200
This is the name of the super continent that once existed about 250 million years ago.
What is Pangaea?
200
This technology was developed in WWII and allowed the mapping of the sea floor.
What is Sonar?
200
Where two tectonic plates collide.
What is a convergent boundary?
200
This forms when two continental plates collide.
What are folded mountains?
200
This lava formation supports the theory of sea-floor spreading.
What is pillow lava?
300
This is any trace of a living organism that has been preserved in rock.
What is a fossil?
300
The process by which new oceanic crust is created.
What is seafloor spreading?
300
Where two tectonic plates move away from each other.
What is a divergent boundary?
300
This is a crack in the Earth's crust where the rocks slip past each other.
What is a fault?
300
These form where an oceanic plate subducts under another oceanic plate.
What are volcanic island arcs and deep ocean trenches?
400
These marks in African rocks support the idea that Africa was once in a colder area.
What are glacial grooves
400
Two pieces of evidence that show that seafloor spreading is actually happening.
What are the age of the rock gets older as you move away from the mid-ocean ridge and the symetric lines of magnetic reversals recorded in the ocean floor.
400
The theory of Plate Tectonics suggests that this force moves the plates of the earth's crust
What is convection currents in the mantle?
400
This feature forms when a divergent boundary happens on land.
What is a rift valley?
400
These form where an oceanic plate subducts under a continental plate.
What are volcanoes on continents, mountain ranges and trenches?
500
The fossils of this fresh water reptile have been found on both Africa and South America.
What is mesosaurus?
500
Deep ocean trenches are created by this action.
What is subduction.
500
This physical property causes rock to rise up at mid-ocean ridges and sink at subduction zones
What is density?
500
These were found on Spitsbergen Island in the Arctic and are evidence that this island was once in a warmer area.
What are fossils of tropical plants?
500
These are two other causes of plate movement other than convection currents. They are caused by the elevated crust at mid ocean ridges and the sinking crust at subduction zones.