Earth Science Crossword

sudden, ground-shaking release of built up energey at or under earths crust.
areas that typically experiance large earthquakes and volcanic eruptions
long chain of volcanoes
An area where molton rock rises to earths surface.
Large slabs of rock that form earths surface, moving over a layer of partly molten rock.
Region where magma brakes through earths surface continually forcing apart old rock and forming new seafloor
Reigon where two tectonic plates are in contact.
Partly molten layer in earths upper mantle just below the lithosphere
Process where earths magnetic field over thousands of years completly reverses its direction
The extent of ancient glaciers also rock markings left behind
super continent
Proposed continental drift theroy
Vally formed on land when magma rises to earths surface at a spreding center
The pulling of tectonic plates as its edge subducts deep into the mantle
The point on earths surface directly above the focus where an earthquake starts
The layer of earth made up of the crust an the uppermost mantle
The pushing of older material aside moving the tectonic plates away from the ridge
shear waves
roll along earths surface like ripples in a pond
travel at about 6 km\s through earths crust