Front

What is the spinning motion of a planet on its axis called?

Back

Rotation

Front

Who wrote the laws of gravity in the 1600s?

Back

Newton

Front

What is the force of gravity on an object called?

Back

Weight

Front

What happens if the force of gravity between the sun and earth were turned off?

Back

The Earth would drift away from the Sun.

Front

What does gravity pull everything toward?

Back

The center of a mass.

Front

What is the term for the path an object takes as it moves around another object in space?

Back

Orbit

Front

What is the difference between rotation and revolution?

Back

Rotation is the spinning of an object on its axis, while revolution is the movement of one object around another.

Front

What is the gravitational force between two objects dependent on?

Back

The mass of the objects and the distance between them.

Front

What is the term for the time it takes for a planet to complete one full orbit around the sun?

Back

Orbital period.

Front

What is inertia?

Back

The tendency of an object to resist changes in its state of motion.