Earth Layers
Boundary Movements
Harry Hess and Beyond
Earthquakes
Volcanoes
100
This causes plates to move
What is Liquid magma
100
Greek meaning of Pangea
What is "all land?"
100
Harry Hess mapped the seafloor using...
What is sonar mapping?
100
A break in the rock
What is a fault?
100
The three volcano types are
What are cinder, composite, and shield volcanoes?
200
The mantle has this type of current
What is convection currents
200
A real-world example of a divergent oceanic boundary.
What is the Mid-Atlantic Ridge
200
Harry Hess's surprising discovery was...
What is finding mountain ranges and deep sea trenches?
200
The most violent earthquake is found at a
What is a subduction zone?
200
Volcanoes form at
What are subduction zones, mid-ocean or rift zones, and hot spots?
300
This is at the bottom of the solid crust layer
What is the lithosphere?
300
This is responsible for break-up the giant landmass of Pangea.
What is a divergent boundary?
300
The process of earth moving back into itself is
What is subduction?
300
This can be over 900 degrees F and have speeds in excess of 100 miles per hour.
What is pyroclastic material?
400
This is the upper layer of Earth’s mantle (bottom of crust).
What is the asthenosphere?
400
This is an example of a divergent continental boundary.
What is the African rift valley?
400
the age of the crust is the oldest at the
What is nearest to the Marianna Trench?
400
A "P" wave is a __, and an "S" wave is a __
What are longitudinal and transverse waves?
500
The temperature range of the mantle in C or F.
What is 500 to 900 °C (932 to 1,652 °F) to 4,000 °C (7,230 °F)?
500
The spreading apart due to tension or the Atlantic becoming larger and the Pacific becoming smaller.
What is the Mid-Atlantic Ridge?
500
Harry Hess' greatest discovery was... and is called...
What is the seafloor is older the further it moves away from the Mid-Ocean Ridge termed Seafloor Spreading?
500
There are an estimated ___ earthquakes a year.
What is 500,000?
500
The subterranean cavity containing gas-rich liquid magma which feeds a volcano.
What is the magma chamber?
M
e
n
u