蠟燭的科學 | Science of Candles
Wick 燈芯
Wax 蠟
Heat 熱能
Carbon dioxide 二氧化碳
Water vapor 水蒸氣
Oxygen 氧氣
Light 光
視頻內容:
Today, we are going to talk about the science of candles.
今天，我們來談有關蠟燭的科學。
(1)What makes a candle burn?
是什麽讓蠟燭燃燒？
(a)To start that burning process, you first need to light the wick.
要開始燃燒過程，您首先需要點燃燈芯。
(b)As the wick burns down, the heat melts the solid wax, which becomes a liquid and then evaporates to become a gas.
當燈芯燃燒時，熱量融化了固體蠟，變成了液體，然後蒸發成氣體。
(c)Wax is made of hydrogen and carbon. When the wax burns with oxygen in the air, it to becomes carbon dioxide, water vapor, heat and light.
蠟由氫和碳組成。當蠟與空中的氧氣一起燃燒時，會變成二氧化碳，水蒸氣，熱和光。
(2)What happens when a burning candle is covered with a glass jar?
當燃燒的蠟燭被玻璃罐覆蓋時會發生什麽？
(a)A lit candle needs to draw oxygen from the air in order to continue burning.
點燃的蠟燭需要從空氣中吸取氧氣才能繼續燃燒。
(b)Thus, oxygen inside the glass jar will decrease and it gets filled with carbon dioxide, and eventually the candle's flame will be extinguished.
因此，玻璃罐内的氧氣會減少並充滿二氧化碳，最終蠟燭的火焰會熄滅。
(3)Is burning candles safe or bad for your health?
燃燒的蠟燭對您的健康是安全還是有害的？
(a)At this time, there’s no conclusive evidence that burning candle wax is damaging to your health.
目前，沒有確鑿的證據表明燃燒的蠟燭會損害您的健康。
(b)However, if you’re worried about the potential negative health effects of burning paraffin wax, you can try using candles made from beeswax, soy wax, or other plant-based waxes.
但是， 如果您擔心燃燒的石蠟對健康有潛在的負面影響，您可以嘗試使用由蜂蠟，大豆蠟或其他植物蠟製成的蠟燭。
(4)Is candle smoke toxic?
蠟燭的烟霧有毒嗎？
Breathing too much of any type of smoke can potentially damage your health.
吸入過多任何類型的烟霧都有可能損害您的健康。
(5)Lastly, as always, be safe, smart, and keep an adult with you when conducting fire experiments.
最後，一如既往，在進行與火有關的實驗時，一定要注意安全和明智的进行，並需要有大人的陪伴。
您也可以訂約Lboy Facebook Page 一起互動， 讓學習變得簡單快樂 https://www.facebook.com/lboyenglish