Thursday and Friday
We started by going over HW from the previous night. Many students had difficulty with the homework because they weren't certain how to fill in the cylinder. I gave them time following the do now, to make corrections to the HW.
Please remind them that the liquids fill the spaces provided in the cylinder. Then they simply add the solids after the liquids are in.
Following the density column practice of the Do Now, we took notes on the procedure for finding the Density of Air.
1. To find the mass.
a. Measure mass of bottle, cap, and air
b. pump air out.
c. measure mass of bottle and cap (NO AIR)
d. subtract (A-C)
2. To find volume.
a. Fill bottle with water.
b. Using a GC determine how much water can fit inside the bottle. That would also be the volume for air too.
3. Divide mass and volume
Some classes were able to move to our reading of density in the book. The article was about Archimedes, a scientist from Ancient Greece who is basically the "grandfather of density". We learned how he determined that the King's crown was made of fake gold.
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