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100
How do we know what Earth is made of
What is geophysical, surveys - seismic, gravity, magnetics, electrical, geodesy
100
Oceanic lithosphere _________ and dehydrates as it subsides
What is heat
100
What are hot mantle plumes
What is hotspot volcanoes
100
The subducting plate is bent downward to form deep depression in ocean floor called ________
What is trench
100
Plates are made up of rigid ______________
What is lithosphere
200
Earths crust is divided into how many major plates
What is 12
200
As with volcanoes _________ are not randomly distributed over the globe
What is earthquakes
200
Volcanoes mostly focus at plate _________
What is margins
200
Plates of lithosphere are moved around by the underlying hot _________
What is mantle
300
What is lithosphere made up of?
What is crust and upper part of mantle
300
The worlds deepest part of the ocean are found along ___________
What is trenches
300
As plates move apart new materials is erupted to fill _______
What is gap
300
Plates move in __________ directions
What is various
300
How many oceanic plates collide and runs over the other which causes it to sink into mantle forming a subduction zone
What is 2
400
Below the lithosphere which make up tectonic plates is what?
What is asthenosphere
400
What is one style of convergent plate boundaries?
What is continent - continent collision Continental - oceanic crust collision Ocean - ocean collision
400
Plate motion causes them to __________
What is collide
400
What boundary moves toward each other
What is convergent
500
What has a divergent plate boundary running through its middle?
What is Iceland
500
What are volcanoes formed by?
What is subduction rifting hotspots
500
Melt that rises forms what?
What is volcanoes
500
The word __________ refers to formation of the crust as the consequence of plate interaction
What is tectonic
500
What boundary moves apart from each other
What is divergent
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