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