Chlorine atoms in the stratosphere A. increase the amount of ozone

B. prevent light from passing through the ozone layer

C. combine with oxygen to form poisonous gases

D. break down ozone into oxygen atoms

The dashed segment of the plotted experiment in the graph in the lesson is called an

The first atomic explosion was detonated in the desert north of alamogordo, new mexico, on july 16, 1945. what percentage of the strontium-90 ( yr) originally produced by that explosion still remains as of july 16, 2016?

In a class of 20 students, what democratic form of governance makes the most sense