PLATE TECTONICS
VOLCANOES
EARTHQUAKES
THE BIG ONES
100
where are plate tectonics located?
The lithosphere or upper mantle
100
What comes out of a volcano?
Hot lava and ashes
100
What is a earthquake?
An earthquake is two tectonic plates grin against each other causing certain parts of the earth to move
100
What was the largest volcanic eruption?
Yellowstone park
200
What is subduction
Subduction is when one lithospheric plate descends beneath another
200
where was the biggest volcanic eruption?
Yellowstone park, (about 2.2 million years ago)
200
On what type of plate boundary would you expect mostly light to minor earthquakes?
divergent
200
what was the second largest volcanic eruption?
Baitoushan Volcano
300
According to plate-tectonic theory where is new oceanic crust being formed?
mid-oceanic ridges or divergent margins
300
where is Mount Saint Helens?
Skamania County, Washington
300
On what type of plate boundary would you expect a great earthquake
convergent
300
where was the largest earthquake?
Shensi, China
400
Oceanic crust is on average how thick
7km
400
how do volcanos erupt
Deep inside Earth, between the molten iron core and the thin crust at the surface, there is a solid body of rock called the mantle. When rock from the mantle melts, moves to the surface through the crust, and releases pent-up gases, volcanoes erupt.
400
At a seismic station the last waves to arrive are ____________________.
surface waves
400
how many volcanic eruptions have occurred in 2013?
50
500
Most of the volume of our planet is composed of __________.
mantle
500
Name two tools used to measure volcanoes and earthquakes
seismograph and seismometers
500
How big an increase in energy is released in going from one Richter magnitude unit to the next
32 times
500
how many earthquakes have occurred in 2013?
1545
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