Cells & Homeostasis: Egg Lab Data Day 1

We began the class period with students extending their Egg Lab procedures to include the steps for today.  We discussed how students would repeat the egg washing process, after which they would measure the mass of their eggs.  Eggs were placed in tap water overnight, and tomorrow they will be transferred to various liquids to determine how the eggs will interact with a new environment.

Once all of the eggs were measured and the data were recorded in student lab notebooks, students shared out their starting mass (measured on Friday when the eggs still had their shells) and their “after vinegar” mass.  We entered the data into a spreadsheet and then students calculated the starting and ending averages.  They checked their math against the averages calculated using the spreadsheet program (Google Sheets) as a calculator.  The data is provided below by class period, with student names redacted:

Period 2:

Student Starting Mass (g) – 9/18 After Vinegar Mass (g) – 9/22
#1 63.7 103.8
#2 63.9 107.0
#3 64.6 103.0
#4 66.4 99.2
#5 67.0 107.0
#6 67.7 99.7
#7 63.0 103.5
#8 61.2 97.1
#9 66.9 108.2
#10 63.6 98.4
#11 56.8 87.5
#12 61.3 92.0
#13 66.9 103.8
#14 67.6 107.2
#15 62.9 97.9
#16 62.2 67.4
% change
Average (g) 64.1 98.9 154.3%

Period 3:

Student Starting Mass (g) – 9/18 After Vinegar Mass (g) – 9/22
Student #1 65.5 104.0
Student #2 65.2 98.1
Student #3 64.3 94.6
Student #4 63.8 95.5
Student #5 64.6 98.2
Student #6 65.8 100.7
Student #7 64.6 106.4
Student #8 66.0 105.6
Student #9 64.5 104.3
Student #10 62.0 95.8
Student #11 67.3 108.0
Student #12 65.7 101.2
Student #13 66.4 106.8
Student #14 65.9 98.2
Student #15 62.9 95.1
Student #16 65.6 94.2
Student #17 63.3 101.2
Student #18 66.0 103.2
Student #19 67.0 105.4
Student #20 67.2 71.9
Student #21 63.0 95.5
Student #22 65.9 107.1
Student #23 62.4 97.3
% change
Average (g) 65.0 99.5 153.1%

Period 4:

Student Starting Mass (g) – 9/18 After Vinegar Mass (g) – 9/22
Student #1 57.0 85.4
Student #2 69.1 111.0
Student #3 66.7 99.8
Student #4 64.7 99.8
Student #5 64.1 96.1
Student #6 54.8 87.1
Student #7 61.8 94.1
Student #8 60.4 95.9
Student #9 67.6 105.1
Student #10 57.4 92.0
Student #11 67.9 93.4
Student #12 65.7 109.7
Student #13 67.1 103.0
Student #14 64.0 101.0
Student #15 58.1 90.0
Student #16 65.6 100.1
Student #17 67.2 106.1
Student #18 65.3 104.6
Student #19 60.8 91.6
% change
Average (g) 63.4 98.2 154.8%

Period 5:

Student Starting Mass (g) – 9/18 After Vinegar Mass (g) – 9/22
Student #1 66.4 105.7
Student #2 63.5 93.8
Student #3 61 92.1
Student #4 63.3 98.7
Student #5 65.1 98.9
Student #6 61 91.1
Student #7 64.3 104
Student #8 60.2 95.1
Student #9 59.6 93.1
Student #10 55.7 82.5
Student #11 58.8 87.5
Student #12 60.3 95.1
Student #13 59.4 98.3
Student #14 62 95.5
Student #15 58.5 87.8
Student #16 58.1 85
Student #17 68.8 106.2
Student #18 58.4 95.8
Student #19 58.3 96.1
Student #20 59.1 88.9
Student #21 66 91.3
Student #22 68.3 100.8
Student #23 66 105.3
% change
Average (g) 61.8 95.2 153.9%

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