The idea that the oldest rocks will always be the bottom layer of a series of
rock layers is called the principle of ???

If x ≤ 25, which could be the perimeter of this rectangle? a) 100 in b) 155 in c) 225 in d) 750 in e) 1500 in

When the soviets created the borders of their central asian and caucus republics, the paid little attention to where each region’s ethic group lived. ethnic-related disputes exist along every sherd boundary in central asia. true false

Which types of seismic waves travel through earths interior? select all that apply. a) l waves b) p waves c) s waves