1. It’s what’s weighing me down….
GRAVITY

2. Gravitation is a force
It means that one thing is attracted to another.
Kinda like magnets.
The bigger the magnet, the stronger it sucks iron toward it. (usually)

3. Everything in the universe is affected by gravitation
The biggest wins!
Whether an object will be pulled toward another object or will be the one doing the pulling is determined by size.

4. The biggest wins An apple pulls on the earth
The earth pulls on the apple
The earth is MUCH larger, so the earth wins
The apple falls to the ground, or more accurately is pulled toward the center of the earth.

5. Gravity pulls on you, too
You pull on the earth
The earth pulls on you
The earth wins because it is SO much bigger
If you put a bathroom scale in between you and the earth, it measures the force that the earth is pulling on you, or your weight.

6. Everything in the universe has gravity
The sun has at least 100 times more gravity than the earth because it is so much bigger than the earth.
The sun’s gravity is what holds the earth in orbit. It is constantly pulling on earth and the other planets.

7. Everything in the universe has gravity
Other planets have gravity too.
The larger the planet, the more it pulls on other things around it.
Your weight would change according to the size of the planet you were standing on.

8. Lose some weight! Weight is measured in Newtons
PLANET
earth
mars
jupiter
SIZE
same
smaller
larger
WEIGHT of 8th GRADER
120 N
Weight is measured in Newtons
Your weight is your mass multiplied by the force of gravity that you are experiencing.
You weigh less on a smaller planet because there is less gravity pulling on your mass.

9. Your mass doesn’t change
If you have a mass of 80 kg on earth, you will still have the same number of particles in your body if you travel to the moon.
You will have less WEIGHT on the moon because the force of gravity is less.

10. The force of gravity depends on how far from the center of the planet you are
If you climb a large mountain, you will weigh SLIGHTLY less because you are farther away from the center of the earth.
If you dive deep into the ocean you will weigh more.