Gravity and Planetary Motion

Front

What is the relationship between gravity and weight?

Back

The greater the gravity's attraction on an object, the greater the weight of that object.

Front

What is the attractive force between objects called?

Back

Gravity.

Front

Why would a person weigh less on the Moon than on Earth?

Back

Because the Moon has less mass and therefore less gravity.

Front

What never changes, no matter where in the universe?

Back

Mass.

Front

Which system has the greatest gravitational attraction between two objects?

Back

System B.

Front

Define gravity.

Back

Gravity is the force that attracts two bodies towards each other.

Front

What is the difference between mass and weight?

Back

Mass is the amount of matter in an object, while weight is the force of gravity acting on that mass.

Front

How does gravity affect the motion of planets?

Back

Gravity keeps planets in orbit around stars, such as the Earth orbiting the Sun.

Front

What happens to weight as gravity decreases?

Back

Weight decreases as gravity decreases.

Front

What is inertia?

Back

Inertia is the tendency of an object to resist changes in its state of motion.