Upon what two factors. does magnitude of the gravitational force between two objects depend ?

The Gravitation Force between two objects depend upon :

1).The product of masses of the objects

2) Distance Between the Objects

Explanation:

Universal Law of Gravitation : It states that Force of gravitation between two  object is directly proportional to the product of masses and inversely proportional to the square of distance between them.

Here,

G = Universel Gravitational Constant

m1 = mass of 1st object

m2 = mass of 2nd object

R = distance between the objects

indicate valleys, hills, steepness and gentleness of slopes.

explanation:

contour lines on a map indicate elevation, or depth. numeric notations on contour lines refer to the level of elevation, or height about sea level.