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Earthquakes,
These flashcards will be on the study of earthquakes.
Question | Answer |
---|---|
Where can earthquakes happen? | Earthquakes can happen near the surface or below it. Most happen in earthquake zones along plate boundaries. Sometimes in the middle of plates. |
What are the two type of seismic waves? | Body waves and surface waves. |
What are surface waves? | Waves that ravel along the Earth's surface. |
What are body waves? | Waves that travel through the Earth's interior. |
How many types of body waves are there? | Three. (P waves,S waves,and L waves) |
What are S waves? | Seismic waves that causes particles of rock to move in a side to side direction. |
What is a P wave? | A wave that causes rock to move in a back and forth direction. |
What is a L wave? | A wave that moves along the Earth's surface and produce motion mostly in the upper few kilometers of the Earth's crust. |
What are P waves also known as? | Pressure waves or Primary waves. |
Which wave is most destructive? | L wave |
Which wave is detected second? | S wave |
Which wave is detected first? | P waves |
Can a S wave travel through an ocean? | No. S waves can't travel through material that is completely liquid. |
What are instruments located at or near the surface of the Earth that records seismic waves? | Seismographs |
What is a seismogram? | Traces of motion that's created by a seismograph. |
Where is the epicenter? | Directly above the surface of the focus. |
What is the focus? | The point inside Earth where earthquakes begin. |
What does the Richter scale measure? | The magnitude of an earthquake by measuring ground motion recorded by seismograms. |
What is the difference in arrival time in S and P waves called? | S.P interval |
What does the Mercalli scale measure. | It measures damage using roman numerals. |