Plate ________ is the process by which convection within the mantle reforms the crust above it.
Fill in the blank(s) with correct word
Question 2
Based on galactic rotation curves and cluster dynamics, we think dark matter:
A) is a minor component of the entire mass of the universe.
B) is best detected from the X-rays it produces in the intergalactic medium.
C) will have no effect on the fate of the universe.
D) comprises over 90 of the entire mass of the universe.
E) will doom the universe to collapse, overcoming the redshifts we now observe.