| Term | Definition |
|---|
| mid-ocean ridges | where youngest material is found, site of a divergent boundary |
| himalayan mountains | formed by the collision of Indo-Australian and Eurasian plates; convergent boundary |
| continental drift | Wegner's theory that states that the continents drifted apart. Seafloor spreading, rock clues, fossil clues, and climate clues are the evidence for this theory. |
| convection currents | the force behind plate tectonics. The rise and sinking of warm and cold material. |
| lithosphere | composed of the crust and upper mantle, sits on top of the asthenosphere |
| asthenosphere | thick plasticlike layer that the lithosphere sits on. |
| Pangaea | the name means "all land". The large landmass that was once all of the continents connected together. |
| plate tectonics | the theory that describes Earth's curst and upper mantle as being divided into sections. |
| Glomar Challenger | a scientific ship that aided in the discovery of seafloor spreading by providing samples of rocks from different locations. |
| transform boundary | place where plates slide past each other. |
| subduction zones | places where plates are pushed down into the upper mantle |
| convergent boundaries | places where two plates collide |
| divergent boundaries | places where two plates pull apart |
| plate boundaries | place where you can see the results of plate movement |
Combine with other sets
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