SBSK+2.3

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Vocabulary

 * Liquefaction**-violent shaking occurs and soft soil turns into mud
 * aftershock**-an earthquake that happens after another in the same area
 * tsunamis**-an earthquake on the sea floor that releases seismic waves causing huge tidal waves to appear
 * base-isolated building**-made to lower the percentage of how much energy reaches the building during an earthquake

How Earthquakes cause damage

 * Earthquakes can create landslides or avalanches
 * Local Soil Conditions
 * when seismic waves move from hard rock,it sends their energy to the soil
 * the thicker the soil,the more violent the shaking will be
 * a house built on solid rock will shake less than a house built on sandy soil
 * Liquefaction
 * liquefaction happens when shaking occurs and soft soil turns into mud
 * buildings sink
 * Aftershocks
 * an earthquake that happens after another in the same area
 * they might happen in hours,days,or even months later
 * Tsunamis
 * an earthquake on the sea floor that releases seismic waves causing huge tidal waves to appear
 * some are the height of a six-story building

Making Buildings Safer

 * buildings need to resist earthquakes
 * Choice of Location
 * filled land can shake violently
 * the farther a structure is from a fault,the less strong the shaking will be
 * Construction Methods
 * new homes are now built on hard ground
 * those that are not will be anchored to solid rock below the soil

Protecting Yourself During an Earthquake

 * you can hide under a table to protect you from the falling cieling pieces
 * you can hide under a doorway because the doorway holds up the ceiling
 * you can crouch down in a corner and cover yourself with your head and neck with your arms

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