How can iron be 5.63% by mass but only 0.49% by volume in the crust

Which feature of a map shows the relationship between a distance on a map and that distance on earth? key scale grid system compass rose

The earth rotates on its axis and revolves around the sun every

The oil and gas found in the middle east are regulated by a. organization of petroleum exporting countries b. southwestern asian oil refineries c. north atlantic treaty organization