Organization of living things unit study(1)

How do you date a sample of rock that you suspect as being one of the earliest on earth

Ascientific idea becomes valid when it is what?

Which statement does lola need to correct, and why? a) statement 1 because spiral galaxies do not havearmsb) statement 2 because the bulges contain mostlyyoung red stars.c) statement 3 because the arms are made of mostlyyoung blue and blue-white stars.d) statement 4 because spirals galaxies contain littleto no dust.(c)