background [prelab assignment (10 points) due at the beginning of lab]
using the below items, design / describe an experiment to determine the density of different solids and liquids.
sketch a data table and describe the data analysis.
review lab report content prior to the lab to organize group roles; don't include response in your prelab assignment.
observe various videos and record your obsevations
answer select questions in the ngss chem textbook
determine the density of different coins & liquids
various objects (either a cube or cylinder); the cylinder, but not the cubes will fit into the graduated cylinder
new & old pennies (1982 "divides" old & new pennies), dimes
water; isopropyl alcohol
graduated cylinder / pipet; balance; ruler
methods / data analysis
SFUSD NGSS Chemistry textbook ch. 1 Density
Engage: Toying with matter [4 points]
Part A Wave Toy ; Process & Procedure = collect appropriate experimental data / observations.
Part B Candles in liquid; (also, floating egg or floating carrot (@ ~ 3:30) or floating clay boat + some measurments, which illustrates the same principle) Process & Procedure = collect appropriate experimental data / observations. What is a basis of the preceding observations; hint: simulation
Reflect & Connect: # 2
Explain: Sink or Float [10 points]
Part A: Determining the density of a liquid; Process & Procedure = collect appropriate experimental data; Stop & Think: # 1 - 5
Part B: Determining the density of a solid; Process & Procedure - replace candles with various coins ; collect appropriate experimental data
Reflect & Connect: #1, 5, 6
Explain: Mind over matter [5 points]
Process & Procedure (it's to develop you reading comprehension skills); # 3, 4, 5
Reflect & Connect: # 1, 2
lab report [19 + 6 = 25 points]
address the above purple items; include prompt (otherwise, lost of points); e.g. select / copy / paste item's prompt using e.g. snipping tool. include relevant experimental data / observations.
develop a lab protocol handout using images / text (or a flowchart) rather than solely using text to describe the lab activity procedure to determine the density of a coin and liquid.
Excel - linear regression analysis