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Plate tectonics Word Scramble

 
 


 

 
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Question Answer
divergentboundary where 2 plates are moving away from each other; associated with mid-ocean ridges
convergentboundary where 2 plates are colliding; associated with deep-sea trenches, volcanoes, and mountains
transformboundary where 2 plates are sliding past one another; associated with faults and earthquakes
Wegenerman who came up with the theory of continental drift
Hessman given credit for the theory of plate tectonics
basaltrock that covers most of the ocean floor
Pangaeaname of the supercontinent 200 million years ago
continental drifttheory stating the continents used to be joined in a single land mass and have since drifted to their current locations
subductionone tectonic plate is being forced under another tectonic plate
mid-ocean ridgechain of underwater mountains
deep-sea trenchlong, narrow depression on the ocean floor; occurs at convergent boundaries
plate tectonicstheory that the Earth's crust is broken into plates which move in different directions at different speeds
lithospherestrong, rigid layer of Earth including the uppermost mantle and overlying crust
asthenospherea weak plastic-like layer of the mantle situated below the lithosphere; convection currents happen here
seafllor spreadingtheory stating that new crust is made at mid-ocean ridges and old crust is destroyed at deep-sea trenches
rift valleylong narrow depression that forms when continental crust separates at a divergent boundary
faultfracture in the Earth's crust; transform boundary