The hypothesis that states that the continents once formed a single landmass, broke up, and drifted to their present locations
A large "supercontinent" that is believed to have connected all of the continents on earth about 225 million years ago.
The process that creates new sea floor as plates move away from each other at the mid-ocean ridges
A theory stating that the earth's surface is broken into plates that move.
Large section of Earth's oceanic or continental crust and rigid upper mantle that moves around on the asthenoshpere
rigid layer of earth made up of the crust and the upper part of the mantle
The solid, plastic layer of the mantle beneath the lithosphere; made of mantle rock that flows very slowly, which allows tectonic plates to move on top of it
Cycle of heating, rising, cooling, sinking that makes plates move.
largest layer of rock between Earth's crust and core containing the lithosphere and asthen0sphere
A boundary where plates are coming towards each other
A boundary where the plates are moving away from each other.
A boundary where the plates are sliding past each other
not completely solid or liquid; capable of being molded or changing form
earth's crust located under the ocean
The portion of the earth's crust that is less dense than oceanic crust
The process by which an oceanic tectonic plate sinks under another plate into Earth's mantle; when one plate sinks beneath another
Please allow access to your computer’s microphone to use Voice Recording.
We can’t access your microphone!
Click the icon above to update your browser permissions and try again
Reload the page to try again!
Press Cmd-0 to reset your zoom
Press Ctrl-0 to reset your zoom
It looks like your browser might be zoomed in or out. Your browser needs to be zoomed to a normal size to record audio.
Your microphone is muted
For help fixing this issue, see this FAQ.