Show:
earthquakes
faults
destruction
volcano
mountains
100
This is what happens when there is sudden movement of rock along a fault?
An earthquake.
100
This type of fault results in stress that pulls rock apart?
Normal fault
100
A dense cloud of superhot gases and rock fragments that race downhill from a volcano is called?
Pyroclastic flow
100
An opening in the earth through which Lava, rocks, and gases are erupted is called?
A volcano
100
When two Continental plates push together, we see mountain formation through?
Folding
200
The first seismic wave (following an earthquake) to reach a nearby city is this kind of wave?
Primary wave
200
Scientists cannot predict exact dates and locations of earthquakes, but they can predict this using seismic gap data?
The earthquake risk of an area
200
Earthquakes that occur in the ocean floor can cause a large water wave called?
A tsunami
200
Most volcanoes form along this type of boundary?
Tectonic plate boundary
200
Blocks of rock tilt when forces pull Earth’s crust apart. Where are these blocks of rocks or ridges commonly found?
Zones of seafloor spreading
300
This is the point on the Earth’s surface, directly above where rocks first start to move during an earthquake?
The epicenter
300
This type of geologic boundary is where most earthquakes occur?
Tectonic plate boundary.
300
Structural cross braces help to reduce this in tall buildings?
Earthquake damage
300
This type of volcano is dome shaped, silica poor, and has mild lava flows?
Shield cone volcano
300
Volcanoes in folded mountain belts form in (oceanic plate partly melts as it goes into the mantle) ?
subduction zones
400
This is the name of the instrument that scientists used to record seismic waves?
A seismograph
400
This type of volcano is usually silica-rich, has secondary vents, and has qualities of both Shield and Cinder cones?
Composite cone volcano
400
Acid rain increases in the Earth’s atmosphere mostly due to?
Erupting volcanoes
400
Violent volcanic eruptions, when silica-rich magma traps expanding gases as magma rises, come from this type of volcano?
Cinder Cone or composite cone
400
Hot Springs that send hot water shooting into the air are called?
Geysers
500
Newer than the Richter scale, this scale is used to describe the amount of energy released by an earthquake?
The moment magnitude scale
500
This type of volcano forms when gas rich lava erupts and hardens before it reaches the ground?
Cinder Cone volcano
500
People that live far from an erupting volcano can still be affected by this?
Ash clouds carried by wind
500
This type of volcano forms when silica-poor lava, from repeated eruptions, flows onto the Earth’s surface to form thin layers that accumulate?
Shield cone
500
Scientists will monitor volcanoes in order to?
Predict future eruptions