If half the K-40 of a rock has
decayed into Ar-40, how old is
the rock?

Study this image. which statements best describe the rock shown? check all that apply. the grains of this rock are jagged. this rock has several coarse grains. the grains in this rock are very large. this rock has a non-banded pattern. the color of this rock is determined by its texture.

Kelly ran electricity though a sample of water using electrolysis. the water changed into two gases, x and y. it was not possible to break down the gases x and y into simpler particles.

You can tell from this karyotype that the individual is female because the karyotype has two chromosomes labeled