How much stuff I have and how heavy it is…

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Presentation transcript:

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…

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.

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

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

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

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

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

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

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

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

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

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.

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?