1. How much stuff I have and how heavy it is…
April 10, 2019
Mass and Weight
How much stuff I have and how heavy it is…

2. Mass: Definition Amount of matter in an object.
April 10, 2019
Mass: Definition
Amount of matter in an object.
Amount of atoms in an object.

3. April 10, 2019
Mass: Tool
Triple beam balance
Electronic balance

4. Mass: SI (Metric Unit) Kilograms (Kg) Base Metric Unit = grams (g)
April 10, 2019
Mass: SI (Metric Unit)
Kilograms (Kg)
Base Metric Unit = grams (g)
25 kg = 25 kg of atoms in the object

5. Mass: Constant or Changing?
April 10, 2019
Mass: Constant or Changing?
Mass is constant
Mass does not change depending on location

6. April 10, 2019
Weight: Definition
Force caused by the gravitational attraction between objects
Amount of gravitational force exerted on an object
Weight measures the force of gravity on an object
Force of Weight = mass x acceleration of gravity
Gravity on Earth = 9.8 m/s2

7. April 10, 2019
Weight: Tool
Spring scale
W = m x a (gravity)

8. Weight: SI (Metric Unit)
April 10, 2019
Weight: SI (Metric Unit)
Newtons (N)

9. Weight: Constant or Changing?
April 10, 2019
Weight: Constant or Changing?
Weight depends on gravity and mass
Weight changes if gravity or mass changes
Gravity depends on mass of the objects and distance
Gravity= attraction between two massive objects

10. Mass Compared to Weight
April 10, 2019
Mass Compared to Weight
Properties of matter. Properties describe matter.
Weight depends on mass.
Measurable.
Often confused to be the same thing.
Both are related to gravity: gravity depends on mass and weight depends on mass and gravity
Measurable in Metric or English System

11. April 10, 2019
Mass versus Weight Lab
What does the graph tell you about the relationship between mass and weight on Earth?

12. April 10, 2019
Mass versus Weight Lab
Which different factors affect the weight of objects?
Extension: The moon is about 1/6 the mass of the Earth. What would the weights of your objects be on the moon? Create a data table to show your data.

13. Gravity Versus Weight Lab
April 10, 2019
Gravity Versus Weight Lab
Explain why your weight is different on other planets. What factors contribute to having more or less weight? Refer to the background information text in the lab notebook for additional help.
Do objects with large masses always have large weights? Explain.
Are the properties of mass and weight useful when trying to identify different types of matter? Why or why not?