Air masses are defined by which key terms?
A Polar
B Tropical
C Maritime
D Continental
E all of the above

explanation:

the universal gravitation equation. since the gravitational force is directly proportional to the mass of both interacting objects, more massive objects will attract each other with a greater gravitational force. if the mass of one of the objects is doubled, then the force of gravity between them is doubled.

sodium i think the chemical element of atomic number 11, a soft silver-white reactive metal of the alkali metal group.

cells spend most of their time in interphase