Uploaded May 2017 | Updated September 2026, 2 weeks ago

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Watch the glass spheres sink when the increase in temperature causes the density of the liquid in the cylinder to change. Created 400 years ago by Galileo, this beautiful glass reproduction contains seven colorful spheres, allowing students to read temperatures calibrated in two degree increments, from 68°F to 80°F. Available at teachersource.com/product/tall-galileo-thermometer/lab-equipment-thermometers