Flowing Color Spectrum @Teachersource

Uploaded September 2017 | Updated September 2026, 2 weeks ago

When inverted, colored droplets appear to be changing shape as they fall from the top reservoir of liquid to the bottom. How many different colored droplets are present? Can you infer anything about their densities? Why do the drops change shape as they fall? Great for sharpening those observational skills! Available at teachersource.com/product/flowing-color-spectrum-aka-liquid-motion-bubbler/density-general

$Backyard Brains Webinar With our Backyard Brains kits, students from elementary to high school learn about the brain and nervous system. They perform the same experiments that university researchers do... but at a fraction of the price! Available here: https://www.teachersource.com/category/backyard-brains$

$Disappearing Beaker This clear beaker has no markings and bends light to the same degree as cooking oil. The borosilicate glass and the oil have roughly the same index of refraction. When this beaker is immersed into a container of oil, the beaker becomes invisible. Package includes the beaker and instructions. You supply the outer container which can be any clear, colorless container with at least a 4 inch opening. Drop pieces of broken borosilicate glass into a large container of oil and watch the pieces disappear. Then, using tongs, reach in and remove a previously hidden, unbroken beaker. Ask students to explain. Available at https://www.teachersource.com/product/the-disappearing-beaker/light-illusions$

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