1. Unit 1: Mass and Volume Lab

2. Volume What are the ways society measures volume?
How should scientist measure volume?

3. Volume We can measure the volume of cylinder using the formula: πr2h.
We can measure the volume of irregular object using water displacement.
Amount of H2O with object = ______ About of H2O without object = ______ Difference = Volume = ______

4. Mass & Volume Lab
Goal: What relationship exists between mass and volume?

6. Best Practice
Lab procedures
Minimize error?

7. By the End….. This must be done by the end of class.
Once you have your two measurements, add your data to the class data on Mrs. Askew’s Computer.
No Units (my data table has the units listed)
This must be done by the end of class.
Return to your seat, there is no closure but, study for your quiz.

9. Mass and Volume Lab
Do you think there is a relationship between mass and volume?
How do you think we can determine if a relationship exist?

10. Class Data
Simple Graph

11. Class Discussion
With your shoulder partner discuss the following talking points and write a short response on your white board.
What type of mathematical relationship seems to exist?
Were there any outliers in the original data? Why?
What would the best fit line look like? Draw a picture on your white board.

12. Class Discussion
Simple Graph

13. Class Discussion Density is mass per unit volume.
Gram per centimeter cubed or
Grams per milliliter
What does this per mean? How do we write that mathematically?
g g
cm3 mL

14. Data
Graph with two best fit line, with slope equation

15. Data
Can you write a density value in a sentence?

16. Data
Can you write a density value in a sentence?

17. Data
What would these two different plastics look like at the particle level?

18. Percent Error
This is the last key concept for Unit 1- Measurement, Accuracy, and Precision Notes

19. Get out your periodic tables
Percent Error
Key Concept 10: Percent error expresses error as a percentage of the accepted value.
Get out your periodic tables

20. Example
A substance has an accepted density of 2.00 g/L. You measured the density as 1.80 g/L. What is the percent error? A B C D

21. Exit Pass- Show calculation and circle answer.
Joshua uses his thermometer and finds the boiling point of ethyl alcohol to be 75C. He looks in a reference book and finds that the actual boiling point of ethyl alcohol is 80C. What is his percent error? A B C D

22. End of Day

23. Class time to finish Accepted Values Tecaform- 1.4033 g/ml
Nylon g/ml