plate tectonics
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Created by:
steph-emma on October 11, 2010
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21 terms
Terms | Definitions |
|---|---|
 epicentre | the point directly above where the earthquake occured |
| wave lenth | the distance between to successive waves |
| destruction | the result of an event that completely destroys something |
| force | the act of something that has great strength |
| after shock | further tremours after the initial earthquake |
| Richtor scale | the measurement of the strength of an earthquake at its epicentre |
| tsunami | a large ocean wave that is caused by suudden motion on the ocean floor |
| earthquake | something that occurs when movement in the earth disrupts. |
| magnitude | the unit used to measure the strength of an eathquake |
| fault lines | lines in the earth most likey to have an eartquake occur near, or on |
| continental drift | the theory of movement that occurs between continents drifting over time |
| plate boundarie | earthquakes are most common here because of the different tectonic plates that meet. |
| drawback | when the water quickly receeds from the beach in anticipation of a tsunami |
| tsunami warning system | a system made for early detection of a tsunami |
| depth | how deep something is. |
| Laurasia | the name of a mass continent present over 180 million years ago. Does not exist anymore due to continental drift |
| gondwanaland | a continent from over 180 million years ago |
| outer crust | the outter layer of the earth |
| pangea | a continent from over 200 million years ago |
| core | the very centre of the earth |
| strike slip, normal and thrust | the three different types of fault lines. |
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