1. The figure shows the age of oceanic crust (red is young, blue isold). Where is the seafloor spreading apart the fastest?
Group of answer choices
A: the southern Pacific Ocean basin
B: the northern Atlantic Ocean basin
C: the southern Atlantic Ocean basin
D: Asia
E: the southwestern Indian Ocean basin
F: the southeastern Indian Ocean basin
2. Can a planet with no tectonic movements have quakes, i.e.,its version of earthquakes which we’d call “planet”quakes insteadof “earth”quakes?
Group of answer choices
No, plate motions are required to produce planetquakes.
No, the lack of tectonic movements imply that the planet is coldand inert.
Yes, heat could be escaping via conduction, hence expansion andcontractions of rocks which could cause planetquakes.
none of these are correct
As compared to the density of the mantle, the oceanic crust is________.
Group of answer choices
initially less dense when it is formed, after formation iteventually becomes more dense
initially more dense when it is formed, after formation iteventually becomes less dense
always less dense
always more dense
none of these are correct
3. At a subduction zone, the overriding plate________.
Group of answer choices
is always composed of oceanic lithosphere
is always composed of continental lithosphere
may be composed of either oceanic or continental lithosphere
is always composed of granite
is always the same age as the subducting plate
none of these are correct
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