Chains of volcanoes -- all lined up in a row or an arc -- are often produced by plate tectonic processes: collision between two ocean plates; collision between an ocean and a continental plate; a tectonic plate moving over a hotspot; and then also volcanic activity within a continental plate with the real cause being mostly unknown. This question has you match these four processes to locations.

The great scientist alfred wegener proposed that continents have moved, while other scientists such as t.c.chamberlin argued against wegener. wegener's ideas eventually won, and are now widely accepted, because: a) wegener's ideas were more beautiful, and so were favored by the intellectual elite.b) wegener's ideas did a better job of predicting the results of new observations and experiments.c) wegener's ideas appealed to dead white european males, whereas chamberlin's didn't.d) wegener's ideas appalled dead white european males, and we all know that in this politically correct era,dead white european males cannot get a fair shake.e) wegener won the nobel prize.

What is an additional type of erosion found at the coast? what does it mean?

Find the area of the shaded region.