The severe shaking produced by ______ can damage or destroy buildings and bridges, topple utility poles, and fracture gas and water mains.
What are seismic waves?
100
When seismic waves move from hard, dense rock to loosely-packed soil, they transmit their energy to the ____.
What is soil?
100
____________ occurs when an earthquake`s violent shaking turns loose, soft soil into liquid mud.
What is liquefaction?
100
Sometimes, buildings weakened by an initial earthquake can collapse during a ___________.
What is an aftershock?
100
When an earthquake jolts the ocean floor, plate movement causes the ocean floor too ____ slightly and push water out of its way.
What is rise?
200
DAILY DOUBLE! - Earthquakes can cause ____ and avalanches.
What are landslides?
200
TRUE OR FALSE? - The loose soil shakes more violently than the surrounding rock. (Hint::Refer to question 2a.)
What is true?
200
Liquefaction usually occurs where the soil is _____.
What is moist?
200
An aftershock is an earthquake that occurs after a larger earthquake in same ____.
What is the area?
200
If the earthquake is strong enough, the water displaced by the quake forms large waves, called ________.
What are tsunamis?
300
In coastal regions, giant ____ pushed up by earthquakes can cause more damage.
What are waves?
300
A house built on solid rock will shake less than a house built on _____ soil.
What is sandy?
300
Liquefaction can trigger __________.
What are landslides?
300
Aftershocks may _____ minutes, hours, days, months after the initial earthquake.
What is strike?
300
A tsunami spreads out from the earthquake`s _________ and speeds across the ocean.
What is the epicenter?
400
______, with their side-to-side movement, can cause severe damage near the epicenter.
What are S-waves?
400
The _______ the layer of soil, the more violent the shaking will be.
What is thicker?
400
DAILY DOUBLE! - Liquefaction removes the strength of the ground and turns it into somewhat of a quicksand, causing items and/or structures to rapidly ____. (Hint::Quicksand causes things to...)
What is sink?
400
An aftershock is very dangerous due to being _____________.
What is unpredictable?
400
Tsunamis ____ only half a meter or so _____ the other waves, but as they approach the coastline, the waves become closer together.
What is rise, above?
500
What is the highest numeral the Mercalli scale can get up to?
What is XII (12)
500
Soft soils ______ ground shaking.
What is amplify?
500
Liquefaction can result in a depression or ______, a type of landslide called a lateral spread, and the formation of sand blows.
What is a famine?
500
If an aftershock is larger than the main shock, that aftershock is renamed as the main shock and the main shock is also renamed, but as a _________. (Hint::Think beFORE and AFTER.)
What is foreshock?
500
A tsunami can be the height of a ______-______ building.