man holding paper, professional male educator, science experiment, whiteboard, classroom setting, candle experiment, water droplets, soot, teaching, education, whiteboard explanation

man holding paper, professional male educator, science experiment, whiteboard, classroom setting, candle experiment, water droplets, soot, teaching, education, whiteboard explanation
man holding paper, professional male educator, science experiment, whiteboard, classroom setting, candle experiment, water droplets, soot, teaching, education, whiteboard explanation
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