science earthquakes
Terms
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- What are the 3 major forces within the rocks of the earth
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1. compression
2. Tension
3. shearing - What is a normal falt
- a fault caused by tension forces on rocks
- What is a reverse faltwhat is a strike falt
- a fault caused by tension forces on rock
- what is a fracture
- a fraction is a break in the rock
- what are seismic waves
- seismic waves are earth quakes waves
- define focus
- Focse: place on the surface of the earthquake starts
- what is a seismograph
- seismograph instruments detects and mesures earthquakes
- what is the epicenter
- Epicenter place on the surface of the directly above the focus
- what are the characteristics of primary waves
- Fastes P-waves pushing together and pulling apart
- what are the characteristics of secondary waves
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second waves to be recorded
slow
side to side - what are the characteristics of surface waves
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L-waves long waves
fast waves
most damage - the release of stored energy when something is stretched to far is known as the
- Elastic energy
- an earthquake occurs when a sudden movement along a fault releases
- energy
- shearing forces push rock in what type of directions
- Opposite, but not directly opposite, horizontal direction.
- as a transverse wave moves through matter, the matter moves
- up and down
- force when an object pushes, pulls or presses on another object
- stress
- shaking of the ground caused by sudden movement of large blocks of rocks along a fault
- earthquake
- a break of fracture in the lithosphere
- fault
- a small earthquake following a more powerful earthquake
- aftershock
- what is liquefaction
- when shaking causes soil to act like a liquid
- what is a tsunami
- a water wave triggered by an earthquake, Volcanic eruption, or land slide
- How do you locate an earthquakes Epicenter
- Triangulation...... Where 3 circles meet