because the soot from the candle rises and sticks to the ceiling which is how they get dirty
Because everything they make it out of is capable of burning.
Because scented candles are scented using a chemical smell that will make the flame burn more through the candles wax.
the color has nothing to do with the candle at diffrent burning rate it is the wick. We found that color does make a difference. We bought the exact same candles except each candle was a different color. Found out that the white candle burned down the fastest, the red was next, and so on. So candle wax color does make a difference in the burning rate of a candle. ( My daughter had a science experiment)
Scented candles have aromatic oils added to them while unscented candles are pure wax; this is basically the only difference.
paraffin
Because everything they make it out of is capable of burning.
There are no candles that are safe for a bird to breathe if it is lit and burning. If the candle is unlit then is is ok. So if you are going to have candles going it would be best for your bird if it was kept in a different room. Or if it is neer the candles make it out in an open, ventilated area.
You blow out candles on a birthday cake because, before you blow them out, you make a wish, and if you blow them all out in one try, your wish comes true. I've had experience! That, plus it is easier to cut the cake if the candles are not burning.
You use fences down from the ceiling in any style you like. EDIT: I used 2 fence pieces (either nether or normal fence) from the ceiling, then arrange fence pieces on all sides of the lowest fence post so you get a cross shape suspended from the ceiling. Then attach fences to the ends of that '+' so you make a larger x and put candles on top of all the uncovered posts. Then place a smaller x attached below the first, without candles to create a sort of triangular formation. It's easier to show a pic but I can't.
All else being held constant - the dependent variable is the composition of the chemical(s) used to color the colored candles. Some additives will speed burning because they are themselves flammable. Some will slow burning because they are less flammable. Some will cause the melting point of the wax to be depressed so that the wax melts quicker - and as it melts and drains away, the candle will burn faster. A more critical factor in reality though is that colored candles are usually made with a different composition than white candles to make it easier to color them. Not only do they contain something to give them color - the composition of the wax the color is added to is different as well. Once you change the basic composition of the candle that much it is tough to compare the candles. It becomes like trying to compare burning oak to burning pine. Yeah - they are similar but you really are not burning the same thing and you don't expect them to burn at the same rate. By controlling the composition of the wax, you can make candles burn faster or slower - without respect to what color they are or if they have no color at all (assuming you don't call white a color).
All else being held constant - the dependent variable is the composition of the chemical(s) used to color the colored candles. Some additives will speed burning because they are themselves flammable. Some will slow burning because they are less flammable. Some will cause the melting point of the wax to be depressed so that the wax melts quicker - and as it melts and drains away, the candle will burn faster. A more critical factor in reality though is that colored candles are usually made with a different composition than white candles to make it easier to color them. Not only do they contain something to give them color - the composition of the wax the color is added to is different as well. Once you change the basic composition of the candle that much it is tough to compare the candles. It becomes like trying to compare burning oak to burning pine. Yeah - they are similar but you really are not burning the same thing and you don't expect them to burn at the same rate. By controlling the composition of the wax, you can make candles burn faster or slower - without respect to what color they are or if they have no color at all (assuming you don't call white a color).
Bees don't make candles but beekeepers sometimes do.
Colonists do blood and sacrifice someone then boil it to make candles.
They used grease and or fat with a whick to make candles. That is the simplest answer.
You can not make candles with food coloring, they are made out of WAX.
Shrek makes candles out of his ears wax.
You make your wish first, then blow out the candles. If you blow out the candles in one breath then your wish is supposed to come true.