1. Welcome to Physics
Motion

2. Warm Up Turn to Page 21 CLAIM EVIDENCE REASONING WHEN DONE:
Write:
CLAIM
EVIDENCE
REASONING
5 Minutes
WHEN DONE:
get out your planner and
Walk the Graph

3. Agenda: summarize in planner
Finish Identifying Relationships Ball Bearing Investigation

4. Learning Targets
I can identify, describe and contrast different patterns of relationships between two variables

5. Writing and Reading Discussion Group Work Instruction Quiet Focused
Active listening
On Topic
Ask Questions
Group Work
Focus on topic
Fulfill Roles
Lean in
Instruction
Listen
Take notes
Raise hands

6. Walk the Graph
Let’s talk it out!

7. B fast walking A slow walking
Turn to the person sitting next to you. Discuss the following question: Which graph—A or B—shows a person walking slowly? How do you know?
Follow up:
What kind of relationship or pattern produces a straight line graph?
In this case, what two variables are in a linear relationship?
What has to be true about the speed of the moving object?

8. away B A
Turn to the person sitting next to you. Discuss the following question: Which graph—A or B—shows a person walking toward from the detector? How do you know?
Follow up:
What can you say about the distance covered by the walker during each walk?
This example highlights two additional variables that are very important when talking about the motion of objects. What are they?
toward

9. A B C position time position time position time
Turn to the person sitting next to you. Discuss the following: Compare and contrast the motion of the person shown in graph A with graph B.
Turn to the person sitting across from you. Discuss the following: Compare and contrast the motion of the person shown in graph B with graph C.
What is the important variable here?

10. Evidence Based Conclusions
Page 21 Have your Identifying Relationships out in front of you

11. Claim Evidence Reasoning
A statement about the results of an investigation.
Evidence
The data, observations or models that support your claim.
Write this down, on the page 21.
Reasoning
Why the data supports your claim. Connects claim to evidence.

12. Investigating Relationships Practice A
You will need to select data points from the graph as evidence

13. Turn to Pages 22 and 23
Tape in Page 22: Ball Bearing Investigation Page 23: Data Table

14. Ball Bearing Investigation
Make a prediction Identify Variables Complete Hypothesis Make a Visual Hypothesis 5 Minutes

15. Put tape marks on table here and here
Set Up
Put tape marks on table here and here
Binder
Ruler
Box
40 cm
70 cm
100 cm
0 cm
Tape here and here

16. How to run a trial
Binder
Ruler
Box
0 cm
40 cm
70 cm
100 cm

17. How to run a trial
Binder
Ruler
Box
0 cm
40 cm
70 cm
100 cm

18. How to run a trial
Binder
Ruler
Box
0 cm
40 cm
70 cm
100 cm

19. Good trials Times must be within 0.1 seconds of each other!
If not, repeat trial
Example 1:
0.37 s and 0.54 s
Difference: 0.17 seconds!
Re-do
Example 2:
0.37 s and 0.41 s
Difference: 0.04 seconds!
Keep!

20. Uncertainty= Range divided by 2
Range and Uncertainty
Uncertainty: estimate of doubt in measurement
Our estimate = the data range divided by 2
Range: The difference between the highest and lowest measurement
Example:
Highest: 0.95 s
Lowest: .076 s
Difference: =0.2s
Distance
Trial 1
Trial 2
Trial 3
Trial 4
70 cm
0.83s
0.95 s
0.75 s
0.88 s
Uncertainty= Range divided by 2
0.2 s ÷ 2 = +/- 0.1 s

21. Hints Read instructions Look at example set up on front table
Follow Roles
Record times to TWO decimal places
(don’t round!)
example: s is 0.56 s, not 0.6 s
Re-watch video if necessary

22. Ball Bearing Investigation
DO:
Set up ramp, meter stick, tape marks
Decide on roles
Collect data
20 Minutes
WHEN DONE: calculate range and uncertainity

23. Clean Up
Lab supplies put away Table supplies returned to box Name tags turned in Work turned in Notebooks in backpack Scrapes recycled Stay in your seat until the bell rings