Why do candles crackle?

The amount and type of fragrance oil in each candle. The crackle you hear comes from any of the chemical compounds present in your candle reaching their respective flashpoints. These may include moisture present in the wick, wax and fragrance.

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And another question, why does fire travel down smoke?

This fire trick is based on how candles work. When you light a candle, the heat from the flame vaporizes the candle wax. When you blow the candle out, vaporized wax briefly remains in the air. Although it looks like you're lighting the candle with smoke, it's really just the wax vapor that ignites. How do you jump a candle flame? Procedure With the help of an adult, light a match. Next touch the candle's wick with the flame of the match. Watch the candle burn for a couple of seconds. Blow out the candle and watch what happens. Light the candle again then light another match. Blow out the burning candle.

Are candles worse than cigarettes?

Andrew Sledd, a pediatrician with a specialty in Environmental Toxicology, told KFVS12 that one hour of scented candle burning can be the equivalent of smoking a single cigarette. Soot from candles can also pose a real threat to our respiratory systems, he said. What do candles do to your lungs? Burning candles releases volatile organic compounds and particulate matter into the air. Particulate matter is a mixture of extremely small liquid droplets and particles that can enter your lungs. There's concern that extended exposure to particulate matter can lead to heart and lung problems.

Correspondingly, can burning candles make you sick?

Exposure to chemicals emitted by scented candles "is so low that they pose no significant risk to human health," she said. "Even the highest users of scented candles and other fragranced products are not putting themselves at any appreciable risk of harm." Why do you have to cut the wick of a candle? Keeping the candle wick trimmed helps control the amount of melted wax (i.e., fuel) that the candle has access to, which helps limit the amount of soot it creates. The trimmed wick also helps the candle burn more evenly, controlling the soot and prolonging the life of the candle.