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Question: The STAO Safe on Science document (2011) indicates that only class 1 and class 2 lasers are recommended for use in high school science classes. Many of the documents that I have examined... read more
https://youtu.be/l1ryVBryubw 1. 00:01 Hot Ice Experiment 2. 00:58 Explosive Soap Foam 3. 01:51 Traffic Lights 4. 03:07 Shape Memory Metal Alloys 5. 04:01 Red cabbage pH Indicator 6. 05:19... read more
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