How are venus and earth similar? a. they are close in size. b. they both have plate tectonics. c. they are about the same distance from the sun. d. they have atmospheres that are mostly carbon dioxide.

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?