scale used to measure the energy released from an earthquake.
200
What is the point beneath Earth's surface where an earthquake starts called?
Focus
200
What is the difference between magma and lava?
Magma is molten liquid rock below the earth's surface and lava is molten liquid rock above the earth's surface.
200
What type of seismic wave is the first to arrive at the seismograph station?
p-wave
200
During an earthquake the earth shakes the hardest here
epicenter
300
What is the place on earth's surface directly above the focus called?
epicenter
300
Which type of volcano is formed from explosive eruptions?
cinder cone
300
Which type of seismic waves cause the most damage?
l-waves
300
Below this number on the Richter scale, people don't even feel the earthquake.
2.5
400
What is the machine called that detects and measure earthquakes?
seismograph
400
This type of volcano has gentle slopes and a wide base.
shield cone
400
These seismic waves move side to side.
s-waves
400
An earthquake above what number on the Richter scales causes damage?
7
500
What is the record from a seismograph called?
seismogram
500
This type of volcano is made out of layers of lava, rock, dust and ash.
composite cone
500
How do scientists find the epicenter of an earthquake?
they need 3 seismograph station readings, they take the s-p interval to find out how far the epicenter is from the station, where the three circles meet is where the epicenter is.
500
Describe how a cinder cone is different than a shield cone.
cinder-explosive/dust, rock, ash/steep side/narrow base.
Shield-quiet/lava/wide base/gentle slopes