1. Gravity and Kinetic Energy Teaching Slides, 2.1
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Gravity and Kinetic Energy Course, 2.1: Mass and Weight

2. Review force and gravity
What is a force?
What is gravity?
When you weigh yourself on a scale, what does that have to do with gravity?
Gravity and Kinetic Energy Course, 2.1: Mass and Weight
Step 1

3. Focus question
G&KE FQ 2.1
What is the relationship between mass and weight?
Gravity and Kinetic Energy Course, 2.1: Mass and Weight
Step 2

4. Spring Scales Show how to set up lab and get materials for each team.
All spring scales need to be calibrated to zero.
Gravity and Kinetic Energy Course, 2.1: Mass and Weight

5. Weigh with spring scales
What is the weight of one marble?
(Look on the side with the N)
Gravity and Kinetic Energy Course, 2.1: Mass and Weight
Step 3

6. Introduce unit of force
N stands for newton, which is a measure of force.
Newton (N)-a unit that describes measurement of force
Gravity and Kinetic Energy Course, 2.1: Mass and Weight
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7. Introduce unit of force
What is pushing or pulling on the bag of marbles?
Gravity and Kinetic Energy Course, 2.1: Mass and Weight
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8. Introduce unit of force
There are really two forces on the bag of marbles.
A force of gravity from Earth pulling it down toward Earth.
The force of the spring scale pulling it up, making it so that it does not fall.
Gravity and Kinetic Energy Course, 2.1: Mass and Weight
Step 4

9. Introduce unit of mass
You probably noticed the side of the scale with the g on it.
What might it represent?
Grams (g)-a unit of mass
Gravity and Kinetic Energy Course, 2.1: Mass and Weight
Step 5

10. Introduce unit of mass
Mass-the amount of stuff in an object. Weight- measurement of force of gravity that is acting on an object. Think about what would happen if you took the marble up to the International Space Station.
Gravity and Kinetic Energy Course, 2.1: Mass and Weight
Step 5

11. Mass and Weight of a Marble
Introduce unit of mass
Mass and Weight of a Marble
Gravity and Kinetic Energy Course, 2.1: Mass and Weight
Step 5

12. Predict weight and mass
How much do you think two marbles will weigh?
What do you think the mass of two marbles will be?
Gravity and Kinetic Energy Course, 2.1: Mass and Weight
Step 6

13. Predict weight and mass
The focus of this part of the investigation is to find the relationship between mass and weight. Collect data for the mass and weight of one to four marbles.
Gravity and Kinetic Energy Course, 2.1: Mass and Weight
Step 6

14. Predict weight and mass
Conduct multiple trials, predict the weight and mass before measuring, and record in a table.
Gravity and Kinetic Energy Course, 2.1: Mass and Weight
Step 6

15. Predict weight and mass
Gravity and Kinetic Energy Course, 2.1: Mass and Weight
Step 6

16. Discuss data
What patterns do you notice about the weight of the system when adding marbles?
What patterns do you notice about the mass of the system when adding marbles?
Gravity and Kinetic Energy Course, 2.1: Mass and Weight
Step 8

17. Mention Newton’s laws
The unit of force we’ve been using, the newton, is named after Sir Isaac Newton (1643–1727), the English physicist and mathematician who wrote three laws of motion that explain behavior of moving objects.
Gravity and Kinetic Energy Course, 2.1: Mass and Weight
Step 9

18. Compare mass and weight
What is the difference between mass and weight?
Will the mass stay the same everywhere that the object goes?
Will the weight stay the same everywhere that the object goes?
Gravity and Kinetic Energy Course, 2.1: Mass and Weight
Step 10

19. FOSS Science Resources
Read “A Weighty Matter” on page 26.
Gravity and Kinetic Energy Course, 2.1: Mass and Weight
Step 12

20. Reading comprehension strategy
Write the Think Questions and a question of your own in the first column. As you read, jot down information that relates to the question in the second column.
Gravity and Kinetic Energy Course, 2.1: Mass and Weight
Step 13

21. Review vocabulary
Spend a few minutes reviewing the vocabulary for this part. Update the vocabulary index and table of contents in your notebook.
gram
mass
newton
weight
Gravity and Kinetic Energy Course, 2.1: Mass and Weight
Step 14

22. Answer the focus question
What is the relationship between mass and weight?
Gravity and Kinetic Energy Course, 2.1: Mass and Weight
Step 15

23. Review notebook entries
Review your notebook entries with a partner. Ask questions, give each other constructive feedback, and revise or add to your responses, based on new information.
Gravity and Kinetic Energy Course, 2.1: Mass and Weight
Step 16