1. Mass, Weight, and Gravity

2. Mass vs. Weight  Mass is a measurement of the amount of material something contains, while weight is the measurement of the pull of gravity on an object.  Mass is measured by using a balance comparing a known amount of matter to an unknown amount of matter. Weight is measured on a scale.  The Mass of an object doesn't change when an object's location changes. Weight, on the other hand does change with location.

3. Mass  The resistance of an object to change its motion  Measured in grams  Earth has a mass of 5.9742 × 10 24 kilograms or 6 and a half trillion billion tons  Your mass on any planet in the solar system is the same

4. Weight  The relationship between an object’s mass and the planet’s gravity  Measured in pounds or Newtons  The weight of an object changes depending on the mass and gravity of a planet  An object deep in space has mass, but since there is no significant gravity, the weight is zero

5. Gravity  The pull of one object on another  The pull an object has depends on how much mass it contains  The acceleration due to the force of gravity on Earth is 9.8 m/s 2

6. Relationships  The force of gravity depends on The mass of the object The mass of the planet The distance from the center of the planet  F = force of gravity  M = mass of the planet  m = mass of the object  r = the distance from the center of the planet  Force also equals mass times gravity