# CH04 – SF Math

Dates

- P4 – Thursday, January 18th
- P5 – Thursday, January 18th
- P7 – Friday, January 19th

Recap

- measuring with graduated cylinders
- what determines number of digits?

Class Business

- Scientific Notation
- Posted review activity (Schoology)

New Idea – Math with SF

- If every number has uncertainty, how do we do math?
- addition & subtraction rules
- multiplication and division rules
- practice: Ch. 2 (37, 38)

New Idea – Units

- how do we treat units?
- conversions = units first
- dimensional analysis
- practice: Worksheet [Shared]

Next Class – Lab Activity

- Aluminum Foil Lab [Shared]
- Q: what is density?
- A: units and linear graph

Homework

- Review Activity
- Ch. 1 (37) (UGH – typo… not Chpter 2)
~~Units Worksheet~~
- Prep the Aluminum Foil Lab
- Note: Purpose, Procedure, Data (no BG Theory)
- Note: THIS is good stuff [LINK]

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