U5 Notes test reatake Flashcards
Same questions as on the test
Plate tectonics is a scientific…
Theory
Tectonic is derived from a greek word that refers to what?
Mason
How many “major” lithospheric plates are there?
7
who kick-started the science of plate tectonics by proposing in 1915 the Theory of Continental Drift?
Alfred wegener
What occurs at a divergent boundary?
New crust forms as plates move apart
What type of boundary creates visible cracks and faults in the crust?
Transform
True or false
When continental lithosphere slides over a hotspot, a chain of progressively older volcanoes is created
False
True or false
The forces that drive the movement of lithospheric plates are all part of a gravity-driven system.
True
What forms at convergent boundaries between two oceanic plates?
Arcs of volcanic islands
What is the term for when one plate slides beneath another at a convergent boundary?
Subduction
Why does oceanic lithosphere sink when it converges with continental lithosphere?
It’s denser
In what physical state are the metals at the very center of Earth?
Solid
In what physical state are the metals in the outer core?
liquid
Which of Earth’s mechanical layers is described as “soft plastic” and translates from the Greek to mean “the weak sphere?”
Asthenosphere
What’s the best physical description for the rock material of the mesosphere?
Stiff plastic
