Talking produces larger moisture particles than our breath produces. Why might a cake surrounded by people talking contain more bacteria than a cake that just had candles blown out on it? The scientists made sure that their experiment had the proper controls, variables and, most importantly, could be repeated.Ĥ. How do we know that the birthday cake study provided accurate results? Our breath actually contains more oxygen than carbon dioxide.ģ. Why doesn’t the carbon dioxide in your breath suffocate the flame? The force of your breath pushes the flame away from its source of fuel.Ģ. Why is it unlikely that you will get sick after eating a piece of birthday cake? You will need to do a little past research to answer this one. What is the secret ingredient in trick candles?ĥ. Why are most birthday cakes circles with candles on them?Ĥ. What original purpose did birthday parties serve for the birthday boy or girl?ģ. Why does a candle go out when you blow on it?Ģ. Mike Szydlowski is science coordinator for Columbia Public Schools.ġ. Now anyone and everyone can sing the song without worry about paying a $5,000 fee! This is why many restaurants created their own "Happy Birthday" jingle and why you rarely heard the song in movies – they didn’t want to pay a royalty.įinally, in 2016 (123 years after the song was created), Warner Music settled the long-standing lawsuit by paying $14 million to put the song into public domain. The family of the original author sued those using the modified "Happy Birthday" song and the legal battles went on for decades. It was written in 1893 by a kindergarten teacher and titled “Good Morning to All.” The tune we sing before blowing out the candles did not start as a birthday song at all. It’s all about chemistry! Happy birthday to you Those sparks are hot enough to re-ignite the ribbon of vaporized wax and the candle relights.
Within a second or two, magnesium dust particles will ignite, causing tiny sparks. However, as soon as the flame is blown out, oxygen can come in contact with the magnesium and the leftover burning ember.
Without oxygen, the magnesium cannot burn. When the candle is burning, the flame keeps oxygen from getting to the magnesium. Trick candles are manufactured by adding a small amount of magnesium metal to the inside of the wicks. The vaporized wax will ignite and travel back down to relight the candle. Blow out a candle, then use a match to light the vaporized wax about an inch above the blown-out candle. However, the ember is not hot enough to re-ignite the vaporized wax. This ember is hot enough to vaporize the wax, and is sent into the air as a thin ribbon of smoke. When the flame does go out, a hot ember on the wick usually remains for a few seconds. It simply means that some loving family members or friends probably put trick candles on your cake. However, what is going on when those candles don’t actually blow out? No, it’s not bad luck. The flame gets disconnected from its fuel and then the flame goes out. The force of your blown air is pushing the flame away from its fuel source. Finally, the time would come, and a ceremonial blowing-out of the candles by the birthday boy or girl was a symbol of good luck and celebration.
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