Plate Tectonics test this week (prior) Flashcards
What are the compositional layers of the earth from outside to inside?
Crust, mantle, core
What are the physical layers of the earth from outside to inside?
lithosphere, asthenosphere, mesophere, outer core, inner core
What is the first step of the convection process?
Fluid HEATED by heat source. EXPANDS and becomes less dense.
What is the second step of the convection process?
less dense fluid RISES until it hits a barrier that stops it.
What is the third step of the convection process?
Unable to rise, fluid TRAVELS STRAIGHT across LOSING HEAT and volume and becoming more dense.
What is the fourth step of the convection process?
Denser fluid SINKS back down toward the heat source.
What is the fifth step of the convection process?
Fluid REHEATED, process is REPEATED.
What lithospheric plate boundary formed the Marianna Islands?
Convergent, where two plates are moving toward each other.
What kind of lithospheric plate forms magnetic stripes?
Oceanic crust
What surface feature is associated with the formation of magnetic stripes?
Mid ocean ridge
How do magnetic stripes form?
Lava cools and minerals magnetically orient themselves.
What are magnetic stripes evidence of?
plate tectonics
