Math & Science

Randomization Distribution Test Website: https://istats.shinyapps.io/PermDist_2samples/

Science Rubric (Wake STEM)

Available materials for water filter:

• Fine sand, coarse sand, and fine gravel: 665g each
• Activated charcoal: 130g
• Potassium aluminum sulfate (alum): 10g
• Lime (CaO): 10g
• Clay powder: 2g
• Coffee filter and/or cheesecloth

By 2/19:

• Each group needs 20 samples of water (10 per filter)

Testing the Waters (2/19)

1. Determine which contaminant your group is measuring: Phosphates or Nitrates.
2. Replace the word "contaminant" with phosphate or nitrate in the table.
3. Measure the amount of phosphates or nitrates and input this data into the table under "original sample." This will act as the control for your experiment.
4. After randomizing your samples test each sample using the STEM filter and the PECIL filter. You will run a TOTAL of 21 tests (including the control).
5. Fill in the table for each sample. You will analyze this data in math.