but the candle itself doesn’t burn down. The basic idea is that the copper tube holds a high-temperature carbon wick that stays saturated with fuel. The fuel burns, but the wick material doesn’t.

When you blow, the carbon dioxide pushes oxygen out of the way and the flame ... these bits of wax molecules make those areas of the flame glow with different colors. How do candles with different ...

Carbon dioxide molecules are heavier than air. Because of this, they push the oxygen and other molecules in the air out of the way as they sink down over the flame and candle. When oxygen is pushed ...