Ocean trenches are most often formed when
A) two continental plates slide past each other.
B) an oceanic plate goes under a continental plate.
C) two oceanic plates grind past each other along transform faults.
D) two oceanic plates hit each other causing both plates to rise up.

Nuclear experimentation is a major global issue that affects relationships between countries. describe why countries try to limit the testing of nuclear weapons.

(1) which phrase describes an important agricultural change that occurred during the mississippian period? (a) first cultivation of wild grains (b) expansion of marsh elder farming (c) spread of corn agriculture (d) gathering of nuts and berries (2) which group of native americans use northwestern arkansas as it’s traditional hunting grounds? (a) osage (b) quapaw (c) woodland (d) caddo

Where is the only location in the united states where you drive on the left side of the road?