CM 3
Cards (5)
- LANDSLIDE
- A _________ is the mass movement of rock, soil, and debris down a slope due to gravity.
- It occurs when the driving force is greater than the resisting force. It is a natural process that occurs on steep slopes.
- The movement may range from very slow to rapid. It can affect areas both near and far from the source.
- Tsunami
- _______ is a series of sea waves commonly generated by under-the-sea earthquakes and whose heights could be greater than 5 meters.
- It is erroneously called tidal waves and sometimes mistakenly associated with storm surges.
- Tsunamis can occur when the earthquake is shallow-seated and strong enough to displace parts of the seabed and disturb the mass of water over it.
- Liquefaction
- Earthquake motion can turn loosely packed, water-saturated soil to liquid— "liquefaction.”
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- Liquefied soil becomes less compact and ultimately lose the ability to support roads, buried pipes, and, of course, houses.
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- It is caused by vibration or saturation with water which causes the soil to decrease in density.
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- This poses danger for it led to unstable structures of buildings due to ground subsidence.
- Fire
- Even moderate ground shaking can break gas and electrical lines, fuel lines, and overturn stoves.
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- To further complicate things, water pipes rupture, so it would be impossible to extinguish the fire.
- Seismograph
- A ________ is an instrument used to record and measure the motion of the ground during an earthquake.
- It consists of a stationary base and a suspended weight or mass that remains stationary during an earthquake but records the motion of the ground.