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Five inquiry-minded activities cover states of matter, phase changes, phase diagrams, sublimation, density, buoyancy, solubility, and pH concepts. Each activity is set up as a discrepant event, engaging your students and then challenging them to explore the concepts. Presenter questions help you challenge students to practice inquiry and problem solving skills as they observe the events. Materials sufficient to perform demonstrations 5 times.
Five inquiry-minded activities using dry ice show your students multiple chemistry concepts in spectacular ways. Concepts covered include states of matter, phase changes, phase diagrams, sublimation, density, buoyancy, solubility, and pH. In "Dry Ice Explosion," students watch dry ice melt then boil inside a sealed pipet bulb until the bulb explodes. With "It Sinks, It Floats," students observe a piece of dry ice sink in water until sublimed bubbles of carbon dioxide buoy the ice and cause it to rise to the surface. In "Floating Bubbles," students see soap bubbles initially rest on a bed of carbon dioxide gas, then expand, then sink as carbon dioxide diffuses into the bubbles, increasing their density. In "Foaming Rainbow," students watch dry ice drop in a soapy solution of universal indicator and see the evolved gas dissolve and lower the solution’s pH, made visible by the indicator. For the finale, "Dry Ice Fire Extinguisher," they observe carbon dioxide gas poured onto a flame and extinguished. Each activity is set up as a discrepant event that engages students then challenges them to explore the concepts. Presenter questions help you challenge students to practice both inquiry and problem solving skills as they observe the events. Dry ice not included (available at many grocery stores). Materials are sufficient to perform the demonstrations 5 times.
|Plastic Tanks, 1.5 gal||2||Included|
|Bogen Universal Indicator, 7 mL||1||Included|
|0.1 M Sodium Hydroxide, 15 mL||1||Included|
|Bubble Solution and Wand, 2 oz||1||Included|
|Teacher's Manual and Reproducible Student Guide||1||Included|
|Watch Glasses||2||Needed, Not included|
|Pliers||1||Needed, Not included|
|Hammer||1||Needed, Not included|
|Pillowcase or Cloth Towel||1||Needed, Not included|
|Polystyrene Foam Cooler with Loose-fitting Lid||1||Needed, Not included|
|Lighter or Matches||1||Needed, Not included|
|Plastic Graduated Cylinder, 500 mL||1||Needed, Not included|
|Stir Plate||1||Needed, Not included|
|Stir Bar||1||Needed, Not included|
|Dry ice, 1 lb||Needed, Not included|
|Ice Cubes||Needed, Not included|
|Thermal Gloves||Needed, Not included|
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