Plate Tectonics
Paleontologists noticed that these were the same on different continents even though the continents were separated by oceans.
Fossils
Scientist who first proposed that thermal convection in the mantle causes continental drift.
Holmes
The zone below the the lithosphere it is more 'plastic' than the lithosphere so it is easier to bend and move.
Asthenosphere
The most outer solid portion of the planet Earth.
Crust
The theory of Continental ______.
Drift
The outer part of the Earth's crust. Is it composed of solid rock.
Lithosphere
The Earth's ________ field reverses from time to time.
Magnetic
Section of the Earth below the crust.
Mantle
Places where new sea floor is being created.
Mid ocean ridge
Alfred Wegner noticed that the continents all for together like a puzzle. This is called ________.
Pangaea
Source of heat in the mantle.
Radioactivity
Sea floor _______.
Spreading
Places where the sea floor is forced under continental plates. ____ zones.
Subduction
Plate _______.
Tectonics
The primary force that causes the sea floor to spread and continents to drift.
Thermal convection
The deepest parts of the oceans.
Trenches
Scientist who first proposed the theory of continental drift.
Wegner