- Penies
- Density (solid)- which method is better?
- Water displacement method
- Measurement method
- Density liquid
- Pipette accuracy
- Conservation of volume?
- Chemical reactions
- temperature/reaction rate relationship
Part A- pennies
- Weights
- Average
- Range
- % error
- Standard deviation (pg. 6&7)
- Data graph
- Sig figs
Graph
- Independent variable is x axis
- Year of the pennies
- Dependent variable is y axis
- Mass of pennies
- Label x and y axis
- Always have a title for the graph
- Do not connect the dots
- Data is spread, so graph does not always start at (0,0)
- Read page 8 of manual
- Clearly label the data points
- S curve for graph
Part B- density of a solid
- U will be given an unknown solid cylinder
- Tare the scale and record its weight
- Find its volume
- Method 1: displacement
- Method 1: final-initial
- Method 2: calculate with a ruler
- Method 2: volume= pir^2h
- Find its density
- density=mass/volume