click below
click below
Normal Size Small Size show me how
It Will Rock You!
Plate Tectonic Theory
Question | Answer |
---|---|
underwater mountain chain | mid-ocean ridge |
mountains formed on land from the compression as two continental plates collide | folded mountains |
proposed continental drift theory | Alfred Wegener |
super-continent | Pangaea |
plate boundary where plates slide past one another in opposite directions or one moves faster then the other in the same direction | transform boundary |
plate boundary where plates move away from each other | divergent boundary |
plate boundary where the plates collide | convergent boundary |
outer layer of the Earth (traditional or by composition) | crust |
inner layer of the Earth made of a liquid layer and a solid middle made mostly of iron (traditional or by composition) | core |
layer of the Earth below the crust and above the core (traditional or by composition) | mantle |
Earth layer made of the upper mantle and the crust | lithosphere |
Earth's plastic-like layer in which convection currents occur in | asthenosphere |
solid portion of the mantle | mesosphere |
liquid portion of the center of the Earth | outer core |
solid portion of the center of the Earth composed of mostly iron | inner core |
currents within the Earth's mantle caused by heat from the Earth's core | convection cells |
where one tectonic plate is pulled underneath another | subduction zone |
Southern portion of the super-continent | Gondwanaland or Gondwana |
Northern portion of the super-continent | Laurasia |
the ratio of the mass of an object to its volume | density |
switching of the Earth's North and South poles | magnetic reversal |
the idea that new oceanic lithosphere forms as magma rises towards the surface and solidifies | sea-floor spreading |