Pls i need the answer asap When denser materials replace lighter material, we refer to this as
A. Conduction current
B. Convection current
C. Continental drift
D. Continental Crust
E. Body wave

Plz hury on a timer which statements explain what happens at deep-ocean trenches? check all that apply. crust is formed. mountains are formed. seafloor spreading occurs. crust becomes molten rock. denser plates slide under lighter plates.

15 points need quick 1. looking at your graph and the geologic time scale during what period did this rock form? what is the age span of the rock, in millions of years? 2. this rock sample is limestone and shale. with what you know about rock formation, what type of environment did these organisms live in? 3. if some of these fossil samples were found in a rock also containing leaf fossils, could you use radiocarbon dating to determine the age of this rock? explain.

Which of the following countries was not an ally to the u.s.s.r. during the cold war? west germany poland romania cuba