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Gravity, Weight, and Mass:PowerPoint Presentation

Gravity, Weight, and Mass:

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### Gravity, Weight, and Mass:

### Moon: 1/6 Earth’s Gravity

What does this have to do with you?

Gravity

- A force that pulls us and everything else toward Earth
- Every object in the universe has gravity
- Why? So we do not float into space

Mass

- The amount of “stuff” (matter) in an object
- Mass does not change

Weight

- Measurement of the force on an object caused by gravity
- Weight does change depending on gravity

How does this all relate?

- Well, you or something else will weigh less or more depending on where you are in our solar system.
- The more mass an object has, the more it weighs because of the more gravity required to pull it down.
- On Jupiter, for example, you will weigh more. Jupiter has more mass than Earth; therefore, more gravity is needed.

Cont.

- On the moon, you would weigh less because the moon has less mass.
- In fact, the moon’s gravity is 1/6 of Earth’s.

Cont.

- Your weight would change at these times. However, your mass would remain the same.
- You would not suddenly be fatter or skinnier. The “stuff” that makes you up (matter) would be the same.

On Jupiter, I would weigh about 270 pounds (lbs.)

I would not be fatter, but I would weigh more because Jupiter has more mass than Earth and more gravity is needed.

On the moon, I would weigh about 20 lbs.

I would not be skinnier. Less gravity would be needed because the moon has less mass than Earth.

On Earth, I weighed 115 pounds. My weight on the moon was about 20 pounds. Is this 1/6 of my weight on Earth? How do you know?

Now you will use your weight (pretend) to determine your weight on the moon and other planets.

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