All __ are molecules, but only molecules made up of atoms from two or more elements are compounds.
a)ionic compounds
b)atoms
c)elements
d)molecular compounds

answer; polycythemia is the correct answer;

b c a d mark me

imagine a line passing through the center of earth that goes through both the north pole and the south pole. this imaginary line is called an axis. earth spins around its axis, just as a top spins around its spindle. this spinning movement is called earth's rotation. at the same time that the earth spins on its axis, it also orbits, or revolves around the sun. this movement is called revolution.