I need help with a few earth science questions. First answer with correct answers for these questions will receive the ten points.!! THANKS!


True OR False...


Oceanic crust becomes denser and subsides as it moves away from the mid-ocean ridge.

Gravity anomalies along the mid-ocean ridge show that it sits upon a high-density layer, thus indicating that the oceanic crust is thin under the ridge.


Multiple Choice...

Which of the following coincides almost exactly with the crest of the mid-ocean ridge?

band of composite volcanoes
collection of volcanic arcs
band of shallow-focus earthquakes

Seismicity along divergent plate boundaries is concentrated along
the crest of the mid-ocean ridge
the lowest parts of the oceanic crust
rocky areas away from the rift zones

A continental rift is a zone where

divergent margins develop within continents
convergent margins cause mantle upwelling within a continent
the continental crust is getting thicker because of tectonic activity

Which part of North America is an example of a continental rift zone?
Basin and Range Province
Gulf Coast
Central Plains