One method I know of is comparing a sample of the rock to other samples which the scientist already knows the age of. I forgot what this method is called but I know it's used by lazy scientists that use other scientist findings like the age of a rock to compare to their own work
<span>achievement
</span>A test that measures a person's knowledge in a specific subject area is a(n) achievement test.
I believe another term for Natural Selection, based off of the answers provided, I would say C, Survival of the Fittest.
According to simple diffusion. Molecules travel from high concentration to low. So it would be traveling into the cornea