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Continental Drift-Plate Tectonics

Name ______________________________

Hour _______
Across
A kind of fault found at transform boundaries
Means "all land"
A boundary between 2 plates moving apart
Introduced during WWI ____ was first used to find submarines
The ____ rocks are located nearest the mid-ocean ridges
The transfer of heat ____ provides the energy to move plates and causes many of Earth's surface features
Glacial deposits found in tropical areas provided ____ clues for continental drift
Usually when 2 continental plates collide ____ are formed
In the Atlantic Ocean where the American plate is moving apart from the Eurasian and the African plates
The cycle of heating, rising, cooling and sinking is called a ____
Similar ____ structures provide support for continental drift
Proposed the theory of continental drift in 1912
One clue in support of continental drift=___like fit of continents
Sensing device for detecting magnetic fields
Over time, Earth's magnetic field has ____ which is recorded in newly forming rocks
When an oceanic plate goes down under a continental plate a ____ zone forms.
Down
A ____ boundary is when 2 plates are sliding past each other
The combination of the Earth's crust and part of the upper mantle
Plates are made of the crust and part of the ____
Less dense material from inside Earth rises and flows sideways carrying the seafloor with it
A theory combining continental drift and seafloor spreading
Found in many oceans ____ provided help in recognizing seafloor spreading
The plastic-like layer beneath the lithosphere
Which is denser, oceanic plates or continental plates?
A plate boundary where two plates are moving together
In the 1960's ____ proposed seafloor spreading