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Earthquakes and Volcanoes
Science Chapter 1 Study Guide
25 cards·by MrsBlanco
What is the point directly above the focus?
epicenter
What is the beginning point of an earthquake?
focus
What is the name of the crust and upper mantle of the earth called?
lithosphere
What is the strength of an earthquake's seismic waves also know as?
magnitude
What are the vibrations that go out in all directions from the focus called?
seismic waves
What is the name of the machine that detect, times, and measures the movement of the earth?
seismograph
What is the name of the giant wave caused by earthquakes?
tsunami
What is the name of the scientists who studies the movement of the earth?
seismologists
Where do earthquakes happen?
below the earths surface
How do earthquakes happen?
when plates below the earths surface shift
What is vog?
volcanic fog
When is magma called lava?
After it comes through the earths surface
What are geysers and mud pots both considered?
hot springs
Where is the Ring of Fire located?
around the edges of the Pacific Ocean
question
answer
What does the Richter scale measure?
the magnitude of an earthquake
What is a dormant volcano?
a volcano that has erupted in the past but not expected to erupt again
What are extinct volcanoes?
volcanoes that do not have a recorded eruption and are not expected to erupt
Describe a shield volcano.
Large, gradual sloping volcano that has erupted many times
What is a cinder cone?
a volcano with a bowl like crater at the top and only one main vent
Ash and lava combine create what substance?
cinders
Why do volcanoes sometimes have more than one kind of eruption?
because an eruption changes the condition inside the volcano
How are geysers and hot springs different?
a hot spring is a pool of water and a geyser blows water and steam into the air
Where is the magma chamber located?
under the volcano
What is a vent on a volcano?
a vent is the main exit of magma in the volcano