For the teacher’s class demonstration 1:

• 1 beaker of water
• 2 paper clips
• 1 small piece of toilet paper
• liquid hand dish soap, a few drops, right from the bottle

For the teacher’s class demonstration 2:

• 2 beakers
• water
• liquid food coloring
• liquid hand dish soap, 5 ml per 100 ml of water
• 2 small capillary tubes

Each group needs:

• set of 5 capillary tubes; thinner is better, such as a package of 500 0.8-mm capillary tubes (100 mm long x 1 mm OD; part # CT95-03 TLC spotting capillary tubes) for $30 from CTech Glass at https://www.ctechglass.com/ctech-08mm-id-glass-tlc-spotting-capillary-tubes-length-100mm-500pcspkg-p-376.html?gclid=CIDRtOeLoc4CFYKFaQodsckOwg
• ring stand base
• 2 ring stand rods
• 90° clip for rods
• 5 ml plastic syringes; no needles necessary, larger syringes may be used; such as from Vitality Medical at http://www.vitalitymedical.com/oral-medication-syringes-with-catheter-tip-by-monoject.html?gclid=CL6ylLeNoc4CFYU2gQodaUcOmA
• 1 glass 300-ml beaker
• ruler
• protractor
• camera (a phone is fine)
• safety goggles
• masking tape
• Surface Tension and Capillary Tubes Worksheet, one per student
• (optional) graph paper, computer with Excel® software or graphing calculator, to graph data

To share with the entire class:

• 5 liquid hand dish soaps of various brands; estimated ~10 ml per group (of a variety of brands) plus ~25 ml for class demo (brand does not matter)
• water
• paper towels