the theory of continental drift proposes that the earth's continents may have once been united as a supercontinent but have drifted apart over time. what was the name of the supercontinent? question 8 options: americas pangaea gondwanaland laurasia

The answer i think you're wanting is Pangaea 

Sorry i dont understand the question can you rephase it?

Hello thereone of the following properties was originally used to arrange elements on the periodic table, but is no longer used to organize the modern version. which property fits this description? answer: atomic mass  was originally used to arrange elements on the periodic table, but is no longer used to organize the modern version.