Safety – Are Resonance Rods Harmful to Hearing?

Question to the STAO Safety Committee Can resonance rods do damage to a person’s hearing, especially if the demonstration is repeated several times during the day? Response Tanya Malusev from Arbour Scientific measured the sound intensity. The maximum value...
Safety Questions – PTC Paper

Safety Questions – PTC Paper

The STAO Safety Committee frequently responds to questions that Ontario teachers pose regarding safety in their science facilities.  Here is a sample: Question Recently, the safety of PTC paper, used widely for demonstrating the ability to taste vs the inability to...
Move Over WHMIS, Here Come’s GHS

Move Over WHMIS, Here Come’s GHS

What is the Globally Harmonized System (GHS)? According to the Canadian Centre for Occupational Health and Safety, GHS stands for the Globally Harmonized System of Classification and Labelling of Chemicals. GHS is a system that defines and classifies the hazards of...
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