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Science
| Question | Answer |
|---|---|
| Describe the theory of plate tectonics | The Earth's plates are moving due to convection currents in the mantle |
| Describe the lithosphere | Hard and rigid layer, consists of upper mantle and crust |
| Describe the asthenosphere | Soft and plastic like layer that slowly moves, consists of middle mantle |
| What evidence did Alfred Wegener have to support continental drift | They had a puzzle like fit, climate evidence, fossil evidence, and rock samples |
| What evidence did Harry Hess have to support Sea floor spreading | Magnetic Field reversals, rock age, and sediment depth |
| Describe the driving force behind plate tectonics and what layer of the earth it is found in | The driving force is convection currents found in the mantle |
| What forms at convergent boundary's | Mountains, Volcanoes, and sub-duction zones/ deep ocean trenches |
| What forms at divergent boundary's | Rift valleys, mid ocean ridges |
| What forms at transform boundary's | Major earthquakes |
| What layer contains earths plates | Lithosphere |
| What happens at a mid ocean ridge | Magma is coming up because the plates are spreading then the rock hardens causing Sea floor spreading |
| What happens at a deep ocean trench/ sub-duction zone | The older plate goes under the younger one, and then the edge of one plate gets bent a bit causing a v shape |
| If Sea floor spreading is happening why is earth not getting bigger | Because of sub-dunction zones the crust is going under melting that rock and recycling it |
Created by:
kayleebowman