Question

In which direction does smoke from the incense stick flow?​

Answer 1

Answer:

The smoke of the incense stick, held above the candle goes in upward direction. This is because, the air above the candle is hot and lighter. While the air at the edges of the beaker is comparatively cooler, so the smoke goes slightly upwards and then spreads in downward direction.

Answer 2

In two ways such as lightly upward and lightly downward as the smoke flow when the incense stick is kept little above the candle.

Explanation: The smoke goes lightly upward and lightly downward as the air above the candle is light and hot while the edges of the beaker are comparatively cooler.