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Lesson 7 Chapter 1-3
| Vocab | description |
|---|---|
| Pangaea | All the continents were once part of a super-continent. |
| Continental drift | The continents are in constant motion. |
| mid-ocean ridges | The mountains ranges in the middle of the ocean |
| Seafloor spreading | The process by new oceanic crust forms along mid-ocean ridge and the older crust moves away from the ridge |
| Normal polarity | a state in which magnetized object will orient themselves to point North |
| Magnetic reversal | the magnetic field reveres direction |
| Reversed polarity | a state in which magnetized object will orient themselves to point South.The opposite of Normal polarity |
| Plate tectonics | Earth's surface is made of rigid slabs of rock or plates, that move with respect to each other |
| lithosphere | the cold and rigid outermost rock layer |
| transform plate boundary | where two plates slide past each other |
| convergent plate boundary | where plates collide |
| subduction | the denser plate sinks below the more buoyant plate |
| convection | the circulation of material caused by differences in temperature and density |
| ridge push | moves the lithosphere in the opposite directions away from the mid-ocean range |
| slab pull | as slabs sinks, it pulls on the rest of the plate with a force |
| divergent plate boundary | where two plates separate |
Created by:
3: >Nyaira Williams< :3
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