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EarthQuakes/Volcanos
Question | Answer |
---|---|
Crust | Outermost, hard solid rock |
Mantle | 80% of the earth's volume, denser than crust |
Innercore | Solid iron |
Outercore | Liquid molten rock and metal |
Lithosphere | Crust and uppermost solid mantle |
Continental Drift | Theory taht the earth's surface is made up of plates that are moving |
Earthquakes | Shaking and vibration at the earth's surface |
Siesmic waves | Waves generated by energy released because of displacement of the crust or any movement of the Earth's crust |
Focus | the exact point where the slippage or breakage takes place |
Epicenter | Point directly above the focus |
P waves (Primary) | Longitudial waves, Moves the fastest, back and forth motions |
S waves (secondary) | Transverse waves, moves slowly, up and down motions |
Surface waves | Both P and S waves, causes the most damage |
Subduction | Denser crust dives under less dense crust |
Mid-Ocean Ridge | Mountain ranges at divergent boundaries |
Sea Floor SPreading | Plate tectonics |
Plate tectonics | Moving plates (7) |
Convergent | Plates comming together |
Divergent | Plates moving away from each others |
Transform | Sliding past |
Magma | Molten rock inside Earth |
Seismology | Study of earthquakes, their orgin, energy and prediction |
Seismograph | Machine that measures seismic waves |
Seismogram | The paper recorded on |
Seismograph Station | Area where earthquakes are recorded with a seismogram |
Ritcher Maginitude Scale | Assings a singel number to quantify the amount of seismic engergy released by an earthquake |
Volcano | An opening in the earth's crust where magma is released |
Lava | hot liquid magma, when it reaches the surface through a vent |
Vent | Opening where the gas, magma, is released |
Shield Volcano | Large, gently sloping mountain |
Composite Volcano | Made of alternating layers of ash, cinders, and lava |
Cinder cone | Smallest and most abundant of volcano types |
Seamount | Underwater volcano/compsite |
Ring of Fire | A zone around the apcific Ocean where oceanic plates collide with Continetal plates |
Hot Spots | weak spots in oceanic crust |