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AbigailG-vol,tec,eq
Stack #132669
| Question | Answer |
|---|---|
| Continental Drift | the hypotesis that continents have moved slowlyto their current locations |
| Pangea | the large landmass that consisted of all the continents connected |
| Seafloor Spreading | 1) hot less dense material below Earth's crust rises upward to the surface at the mid-ocean ridges 2) then it flows sideways carrying the seafloor away from the ridge 3) as the seafloor spreads apart magma moves up and flows from the cracks cools=seafloor |
| Plate Tectonics | Earth's crust are broken into sections called plates which move on a plasticlike layer of the mantle |
| Plate | sections of Earth's crust |
| Lithosphere | plates and upper mantle form the lithosphere |
| Asthenosphere | plasticlike layer below the lithosphere |
| Convection Current | thought to be the force behind plate tectonics |
| Earthquakes | caused by strike-slip faults |
| Primary Waves | 2x faster than secondary waves |
| Secondary Waves | 2x slower than primary waves |
| Surface Waves | the waves we feel during an earthquake |
| Epicenter | directly above the focus; at the surface |
| Seismograph | measures the strength of the earthquake |
| Volcano | an opening in Earht that erupst gases, ash, and lava |
| Vent | the opening that magma flows out of |
| Crater | the steep-walled depression around a volcano's vent is the crater |
| Hot Spot | some areas at the boundary between Earht's mantle and core are unusually hot |
| Sheild Volcano | quiet eruptions of basaltic lava spread out in flat layers |
| Cinder Cone Volcano | when tephra falls to the ground, it forms a steep-sided, loosely packed cinder cone volcano |
| Composite Volcano | the eruption can be explosive then, can switch to a quieter period, erupting lava over the top of the tephra layer |
| Tephra | bits of rock or solidified lava dropped from the air are called tephra |
Created by:
Abigail Garrett
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