a rigid block of crust and upper mantle rock.
the outer layer of the Earth.
the layer of the planet Earth beneath the crust and outside of the core.
the center-most part of Earth.
an opening in Earth's crust through which molten lava, ash and gases are ejected.
molten rock beneath the Earth's surface (*found inside a volcano).
molten rock that issues from a volcano (*liquid that flows on the outside of a volcano).
when the plates of Earth's crust move to form landforms such as mountains and trenches.
the idea that the Earth originally consisted of one large super-continent (one piece of land).
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 above 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.