Why is inside my nose black?

Breathing in air pollutants can cause mucus to turn black. Particles of dirt or industrial chemicals can settle in the airways, darkening the color of mucus and phlegm. When you travel to a place with heavy pollution and poor air quality, you may see changes in your mucus.

Read more

How do you relate the burning candle and our body cells?

The candle burns wax. Your cells "burn" nutrients from food. The nutrient the cell uses for energy is glucose, a sugar, which is a carbohydrate. Both the cell and the candle produce carbon dioxide in the burning process. What kind of change is burning of candle and why? The phenomenon which burning of candle belongs to both physical and chemical change. When a candle burns, the oxygen in the air reacts and forms carbon dioxide. A new substance, the CO2 is formed. So it is a chemical change.

Keeping this in consideration, is burning a candle a physical or chemical change?

If the wax was simply undergoing physical change, would you expect the candle to produce heat and light as it does when a candle burns? The process of burning (as opposed to evaporating) is a chemical reaction, a chemical change. What is the meaning of burning candles? to work or do other things from early in the morning until late at night and so get very little rest. SMART Vocabulary: related words and phrases. Work, working and the workplace.

Moreover, what is the purpose of the candle wick?

The wick is the braided cotton that conveys (or wicks) the fuel - which is the wax - to the flame. If the wick is too tall, it could supply too much fuel to the flame too quickly, creating excess smoke and soot. Consequently, why do flames go up? When a candle burns, the flame heats the nearby air and starts to rise. Basically the continuous movement of hot air going up displaces cooler air down to the side which then gets heated up again and move upwards causing the distinctive shape of the flame and which is why it points only upwards.

In respect to this, is lighting a candle a chemical reaction?

A candle flame is actually a chemical reaction in action! Candle wax is one of the chemicals in the reaction.