8th Grade Gravitational Forces

Mass and weight are different. Mass depends on _____.

• the amount of matter only

• gravitational force and the amount of matter

• gravitational force only

• the location of the object and the amount of matter

If the mass of one of two spheres increases, how does it affect the gravity between the two spheres? (Hint:recall the simulation in which we changed the masses of 1 or 2 objects and saw the changes in the gravitational forces.)

• The gravity increases.

• The gravity decreases.

• The gravity fluctuates.

• The gravity is not affected

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There is a gravitational force between you and your desk. This gravitational force is not noticeable because _____.

• it doesn’t need to be large or obvious to be gravity

• the distance between the objects is small creating less gravity

• the masses and gravities are tiny compared to Earth's mass and gravity

• it is a noncontact force and noncontact forces are usually small

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Gravity is an example of which kind of force?

• contact

• noncontact

• speed

• direction

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An object’s weight and mass are _______.

• proportional

• equal

• not related mathematically

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A planet is discovered that is twice the size of Earth but has the same gravitational acceleration. If you weigh 900 N on Earth, on the new planet you would weigh ____.

• 450 N

• 1800 N

• 900 N

• 1000 N

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Mass varies depending on where the object is located. (Hint: Think about your mass on the moon compared to your mass on Earth.) ______________

• False

• True

Mass and weight are different. Weight depends on _____.

• the amount of matter only

• gravitational acceleration and the amount of matter

• gravitational acceleration only

Gravitational force differs based on two things. It increases with increasing __.

• mass

• distance

• speed

• direction

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Gravitational force differs based on two things. Gravity decreases with increasing ___

• mass

• speed

• distance

• direction