How would you explain the earth's atmosphere?

Explain the source of radioactivity in uranium in earth’s crust by which it produces nuclear radiation

Can bacteria reproduce in a way such that when you start out with two bacteria, you get five bacteria? why or why not? * a. yes, because bacteria reproduce sexually, and can produce any number of offspring, just as humans do. b. no, because bacteria grow at an exponential rate. c. no, because when bacteria reproduce, they split into two parts, and two bacteria splitting would result in four bacteria.

Other than earth, is also known to have magnetic pole reversal? a: venus b: mars c: earths moon d: the sun