I don’t really know but Yk how they are categorized by color try checking the atomic levels or some around that hope I was some type of help
Actually when you look that up.... UH that is hair loss or he could be considered MR. CLEAN
5*10^-18 is the answer because in scientific notation the first number has to be between 1 and 10
1.For the first one, I'd say B, because the distance between each continent is greater than it was back then, allow for the mesosaurus to travel that distance.
2. Last one D, the landmass Wegener believed to exist was called pangea