What did paleomagnetism give strong evidence for 15 points a. earthquakes b. magnetic storms c. pangea d. seafloor spreading

I believe the answer is Pangaea

I hope this helps :)

Hope this helps. The answer is C.

answer: atomic mass was originally used to arrange elements on the periodic table, but is no longer used to organize the modern version.

explanation:

originally atomic mass was used to arrange elements on the periodic table from left to right in a row. each column then shows similar properties of elements of a group.

in modern periodic table, the atoms are arranged in increasing atomic number. as atomic number represents the number of protons in an atom which is unique for every atom.