Gravity and Celestial Motion

On the moon, an astronaut weighs 1/6th of his/her weight on Earth. This is because the moon's surface gravity is

• stronger than Earth's
• not as strong as Earth's

What two factors affect the gravity at a planet's surface

• Length of a Year, Rotation Period
• Mass, Diameter

weight is measured using a

• spring scale
• balance

mass is measured using a

• spring scale
• balance

Multiply the given weight times the Surface Gravity Factor for each planet to determine the answer. What would a 100lb person on Earth weight on Neptune? Neptune's Surface Gravity Factor is 1.14.

• 14
• 114
• 100

Multiply the given weight times the Surface Gravity Factor for each planet to determine the answer. What would a 100lb person on Earth weight on Jupiter? Jupiter's surface gravity factor is 2.53.

• 253
• 25
• 100

Multiply the given weight times the Surface Gravity Factor for each planet to determine the answer. What would a 100lb person on Earth weight on Mercury? Mercury's surface gravity factor is .38.

• 100
• 138
• 38

Does the MASS of an object change when you move the object to a new planet?

• Yes
• No

Does the WEIGHT of an object change when you move the object to a new planet?

• Yes
• No

True or False: Gravity is everywhere.

• True
• False