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unit 3 vocab gianna
plate tectonics
Term | Definition |
---|---|
Asthenosphere | upper layer of earths mantel |
Subduction | when one plate undergoes a more dense one |
Seafloor spreading | when a divergent boundary occurs and new seafloor is created |
Mantle convection | causes the plates to move |
Ridge push | sliding plate force acts as a driving force |
slab pull | when a less dense plate undergoes more dense plate |
lava | hot molten liquid that comes out of volcanoes |
magma | hot liquid inside volcanoes and earth mantel |
tectonic plate | a big slab of rock |
Theory of continental drift | theory the continents have drifted over time |
convergent | 2 plates moving together |
divergent | 2 plates moving away from each other |
transform | 2 plates sliding against each other |
hot spot | a spot with raised tempature |
epicenter | center of an earthquake |
focus | right above |
pangaea | the super continent |
geohazard | a hazard that might cause damage to earth |
reverse fault | one side moves up and over the other side |
strike slip fault | shearing force occurs in a horizontal motion |
normal fault | tension occurs in a vertical direction |
compression | a type of stress where something is dense |
tension | a type of stress when somethings tight |
shearing | a type of stress when something breaks off |
felsic | lightly colored minerals |
mafic | dark colored minerals |