Two Canadian cities are doing an about face on their decision to remove flouride from drinking water after rates of tooth decay spiked, especially among children.
Source: Canadian cities rethink removal of fluoride from tap water | CBC News
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Categories: Gr 7-8 Science & Tech, Gr 9-10 Science, Gr. 11-12 Physics
https://youtu.be/_k9egfWvb7Y How do you measure big forces accurately? By calibrating your force transducer on the world's biggest weight - 1,000,000 pounds of force. This machine ensures planes... read more
Categories: Gr 4-6 Science & Tech, Gr 7-8 Science & Tech, Gr 9-10 Science, Gr. 11-12 Biology
https://youtu.be/spTWwqVP_2s Massive vines that blanket the southern United States, climbing high as they uproot trees and swallow buildings. A ravenous snake that is capable of devouring an... read more
Categories: Gr 9-10 Science
Introduction Since the distances to the stars cannot be measured directly, astronomers use a variety of techniques including triangulation and parallax, comparison of absolute and apparent magnitude,... read more
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