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RE Vocab (4)
| Question | Answer |
|---|---|
| crust | thin and solid outermost layer of the Earth above the mantle, thinnest layer, 2 types - oceanic and continental |
| core | central part of the Earth below the mantle - made of iron and nickel, 1/3 of Earth's mass, inner and outer |
| mantle | layer between core and crust, 2/3 of Earth's mass, magma comes from here |
| lithosphere | solid, outer layer consists of crust and upper mantle, divided into plates |
| aesthenosphere | slowly flowing rock on which the plates move |
| mesosphere | middle layer - thickest |
| tectonic plates | blocks of lithosphere, various sizes |
| continental drift | hypothesis that states the continents formed a single landmass, broke up, and drifted to their present locations |
| Pangaea | the most recent supercontinent |
| sea-floor spreading | process by which new magma rises toward the surface, spreading the continents, forming new ocean lithosphere |
| plate tectonics | theory that explains how large pieces of lithosphere move and change shape |
| convergent boundary | where 2 plates come together |
| divergent boundary | where 2 plates move apart |
| transform boundary | where 2 plates slide past one another |
| compression | stress when forces act to squeeze an object, may cause a reverse fault |
| tension | stress when forces tend to stretch an object, may cause a normal fault |
| folding | bending of rock layers due to stress |
| fault | break in a body of rock along which there is movement |
| shearing | stress which moves blocks of rock past one another, may cause a strike-slip fault, San Andreas Fault in California |
Created by:
JSchneider
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