Seismology
What are the giant pieces of Earth's outer layer where most earthquakes occur called?
What is tectonic plates
point inside Earth where an earthquake begins?
What is the focus
After an earthquake, what might cause more damage to structures?
What is aftershocks
an earthquake that is erupting regularly
What is active
2 classifications for all volcanoes
What is quiet or explosive
seismologists use this to record and measure the waves from an Earthquake
What is a Seismograph
point on Earth's surface directly above an earthquakes starting point?
What is the Epicenter
the fastest seismic waves that can travel through solids, liquids, and gases called?
What is P Waves
An earthquake that has not erupted for a while but is expected to erupt in the future
What is dormant
This material is in high content in lava from explosive eruptions
What is silica
waves of energy that travel through earth called?
What are seismic waves
name for a break in Earth's crust where tectonic plates slide?
What is the Fault
waves that stretch rock sideways and cannot travel through liquids?
What is S Waves
A rock formed by fast moving hot lava that is thin and runny
What is Pahoehoe
Magma moves up from the magma chamber through this long tube connecting to Earth's surface
What is a pipe
A scale is used to measure the intensity of an earthquake?
What is the Modified Mercalli Intensity Scale
3 types of Breaks due to stress on Rocks
What is normal, Reverse and Strike-slip faults
A string of Island formed by volcanoes
What is an island arc
A rock formed by slow moving lava that is cooler and thicker
What is Aa
the opening where Molten rock and gas leave the volcano
What is a vent
the measurement of the strength of an earthquake called?
What is Magnitude
the science in which earthquakes are studied?
What is Seismology
How are surface waves different from P or S waves?
What is They are most destructive
What is an area where material from deep in Earth's mantle rises through the crust and melts to form magma Hint: Happens where there is NO plate boundary
What is a hot spot
A volcano that can alternate from quiet to explosive
What is Composite Volcanoes