Gravity + mass & weight

What is the force that pulls objects down toward the Earth?

• gravity

• friction

• air resistance

Gravity is the force of attraction ___

• on a heavy object, due to a lighter one

• between two objects of the same size

• between any two objects made of matter

The force that causes objects with mass to attract one another.

• Weight

• Gravity

• Mass

• Magnetism

Why do planets orbit the Sun?

• The Sun is the only celestial object that has a gravitational pull.

• The Sun’s chemical composition makes it attract planets.

• Only celestial bodies that emit light, like the Sun, can be at the center of an orbit.

• The Sun is the most massive object in our solar system, so it exerts the greatest gravitational pull.

Any object with mass has gravity.

• True
• Sometimes
• False
• Never

As distance between two objects increase the pull of gravity 

• Increases
• Decreases
• Stays the same

A person would weigh less on on the Moon than on the Earth because . . .

• Moon has more mass, and therefore more gravity
• Moon has less mass, and therefore more gravity
• Moon has more mass, and therefore less gravity
• Moon has less mass and therefore less gravity

Which of the following will not change in different gravitational fields?

• weight
• force
• mass
• pounds

A physical science test book has a mass of 2.2 kg.

a. What is the weight on the Earth?

b. What is the weight on Mars (g = 3.7 m/s2 )