1. Warm-up (Sept 15 and 18) Homework Day 4 in inbox, please!
Also get out:
Goggles, highlighter, and Syllabus/Safety Contract

2. Safety Training! Safety quiz next class!
You need to know your safety contract and the content of our safety training
Powerpoint for lab safety on Moodle

3. Demo: Macro and Micro-scopic matter!
Macroscale =
Microscale =
Dots and faces demo – zoom out!

4. In your notes: Properties of Matter
What is matter?
Occupies space and has mass
Exists in three states
solid: rigid, fixed volume and shape
liquid: volume but conforms to its container
gas: no fixed volume OR shape
Yes, plasma (ionized gas)…not super important to us right now!

5. Properties of Matter Pure substance Mixture: multiple pure substances
Constant composition
Single element (aluminum, Al) or compound (water, H2O)
Mixture: multiple pure substances
Homogeneous = can’t tell one part from another (Solution if it is dissolved)
Heterogeneous = visibly distinguishable parts

6. Examples! Put into each of the correct categories in your notes…
bubble tea blood chlorine diamond ethanol hydrogen peroxide iodine krypton milk Paraffin wax tin chloride salt copper brass steel air gasoline uranium dry ice strawberry lemonade sugar oxygen iron

7. Good to know! Dry Ice = compound Steel = mixture Brass = mixture
Solid CO2
Liquid Nitrogen is used to cool the carbon dioxide down at high pressures
Sublimation – the cool part of Dry Ice!
-79.6OC (solid)  gas (no liquid in between!)
A little video
Steel = mixture
Alloy (solid solution) of Iron and Carbon
Brass = mixture
Alloy of Copper and Zinc

8. Question to ponder in groups: How can we identify a piece of matter?
Conductivity, luster, heat capacity, radioactivity,

9. Exit Ticket: Sig Figs Practice Quiz
Log on to your AOSR
Follow link from me to the practice quiz!
Calculator needed!
Take your time and do your best! Show me what you know!

10. Homework Day 5 Safety quiz next class (T/W)
Look at safety contract and powerpoint!
Keep studying sig figs if needed:
Extra Worksheets for Scientific Notation and Sig Figs on Moodle with Keys if you need extra practice
Come see me if you are struggling
Quiz coming up! (Th/F)