 | Term | Definition |
| |
The 3 Types of plate movement |
Extentional,Compressional,and Transform |
| |
Extentional |
Two plates pushing away from each other |
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Compressional |
Two plates pulling towards each other |
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Transform |
Two plates going the oppostie way |
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Plate |
A large rigid slab of rock |
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Pangea |
A super continent |
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How many plates are there? |
10 major ones and many small ones |
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How long is it to get to the center of earth? |
6,000km (60,000m) |
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the 3 types of seismic waves |
P waves (primary waves), S waves (secondary waves), and surface waves |
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Primary waves |
They are the strongest type of waves, and they are most dangerous and they move rock. |
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Secondary waves |
These waves are slow, and they are near the surface |
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Surface waves |
Waves that are very slow. |
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Seismograph |
A machine that measures earthquakes |
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Epicenter |
This consists of three seismographs,you need one in different places.You record what you got for all three of them and with computer calculations figure out the center were it came from |
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Tsunami |
They are underwater earthquakes, and can travel to 600 mph, and it can go 400 miles |
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Richter Scale |
A scale that measures earthquakes and tsunamis,it is a machine used around the world |
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Where are earthquakes the strongest? |
At the epicenter, if you go farther from the epicenter the earthquake gets weaker. |
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Earthquake intensity |
beside size an earthquake can be compared by intensity |
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What happens before a tsunami comes? |
The water line will recede |
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