Gravity, Mass, and Weight
What direction is Earth's gravitational force exerted?
Down.
What is another word for down in the sentence below: Earth's gravitational force is exerted down?
Earth's gravitational pull exerts to the center of the earth.
What is the closest planet to the moon?
Earth.
What keeps things from flying off into space?
Gravity.
What is the earth's gravity always doing?
It is always pulling on the Earth.
What is gravity?
It is the force that attracts all objects together.
A dog that weighs 30 pounds on Earth weighs about 10 pounds on Mercury. From that information, what can you infer about Mercury?
Mercury's mass is much smaller than Earth's mass.
Can two objects weigh different and still have the same mass?
Yes, because the amount of mass never changes because the amount of material never changes.
Does gravitational force between two objects happen everywhere in the universe?
Yes.
How much would you weigh on the moon if you weighed 60 pounds on Earth?
You would weigh 10 pounds.
Do two objects have to be the same size to weigh the same?
No, an object can be much smaller than another object but it can have the same amount of mass.
Are size and mass the same thing?
No, an object can be the same size as another object but it might have more mass.
Is the earth's gravity the same as the moon's gravity?
No.
How much stronger is Earth's gravity than the moon's?
Six times stronger.
What is mass?
The amount of material in an object.
Is the gravitational pull between two objects greater when they are closer together, or when they are farther apart?
The gravitational pull is stronger when the objects are closer.
The force of gravity depends upon what two things?
The size of an object and the distance away.
Does the smaller object usually move towards the larger object, or does the larger object usually move towards the smaller object?
The smaller object usually moves towards the larger object, because the larger object has more mass than the smaller object, so it has a larger gravitational pull.
True or False: The more mass an object has, the stronger its gravitational pull.
True.
True or False: Two objects can have the same mass but have different weights.
True.
What is weight?
Weight is a measure of how heavy something is.