Gravity and Inertia

What two forces affect gravity?

• mass and inertia

• mass and distance

• mass and force

• mass and weight

What forces cause a planet to orbit?

• gravity and orbit
• gravity and inertia
• gravity and mass
• gravity and weight

An astronaut weighs ____ in space.

• less
• more
• the same
• 100 Newtons

You weigh more on a mountain than in a valley.

• True
• False

You weigh more on the beach than on a mountain.

• True
• False

Your mass increases on a large planet with more gravity.

• True
• False

On Earth, which has a greater gravitational force acting on it?

• an iPhone
• a laptop
• a dog
• a car

Gravity on the moon is about 1/6 the gravity felt on the earth. This is because

• the moon is much less massive than the earth
• the earth has a molten core and the moon doesn't
• the moon is so much further from the sun than the earth.
• the moon is so far away from the earth

An astronaut's mass ______ in space.

• changes
• increases
• decreases
• stays the same

An elf lives at Mrs. Pryor's house during the Christmas season.

• True
• False