What is the name of the process in which oceanic crust moves apart at mid-ocean ridges due to convention currents in the mantle?
a.
subduction
b.
compression
c.
convergence
d.
seafloor spreading

Need in all of themmm only answer if you know plsssss

Light from the sun reaches the earth in 8.3 minutes. the velocity is 3.00 x 10^8 m/s. how far is earth from the sun? i know how to get to d = (3 x 10^8 m/s)(498 sec). i just don't know how to get from there to the answer being 1.5 x 10^11 m.

Based on the concept of the wave-like nature of light, huygens' theory of light postulates that the more light was "bent" by a substance the slower it would move while traversing across that substance. a) deflection b) interference c) refraction d) resonance