Ring of Fire Quiz
About how deep is the trench by Alaska?
21,000 ft. deep
How much of the world's volcanoes are found along the Ring of Fire?
3/4ths
How hot was the water coming out of the black smokers
750 degrees
What percent of the world's earthquakes occur around the Pacific Rim/Ring of Fire?
90%
Why does the study of volcanoes around the Ring of Fire start in Alaska?
Because 75% of the volcanoes in the ring of fire are in Alaska.
Why is blocky lava an important clue to the explosiveness of a volcano?
Because the thicker lava causes a more violent eruption.
What happens when the gas in magma is unable to escape?
Giant explosions occur from the build up of all of the gas.
What is the presence of hornblende in the rock an important clue?
It shows that water does exist deep in the earth
What is the major feature that keeps the plate movement alive?
Mid-Ocean Ridge
What are scientist using to track the movement of plates around the Ring of Fire?
Specific GPS
What is the clue scientist found about the Ring of Fire's megathrust earthqukes?
The deeper the earthquake is, the more severe and violent it will be
What happens when the upward energy of an eruption column decreases?
The eruption column collapses on itself
What is the evidence that is 1/4 mile inland regarding the seriousness of the earthquakes?
The land was lifted and moved inland to reveal a second beach.
What role do convection currents play in plate tectonics?
They move the plates
What is one of the major hazards associated with megathrust earthquakes?
Tsunamis Killer waves
What is the ultimate process by which plates move?
convection
What type of volcano is Augustine Volcano?
stratovolcano
What is the process that moves rock and seawater down into the Earth?
subduction
To what location are parts of California, Baja Mexico and the Hawaiian Islands moving?
the North
What is the surprising find made in the fumaroles at Mt. Lassen?
the gases contain Carbon-12 created by Phytoplankton
