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Question
A burning incense stick is fixed, pointing downwards. In which direction would the smoke from the incense stick move? Show the movement of smoke with a diagram.
๐ Concept: 7.2 Convection
Show Answer
Smoke moves upward — always, regardless of stick direction
Explanation
- Smoke is hot and lighter than surrounding cool air.
- Lighter substances rise by convection .
- Stick points down, but smoke still curves upward.
- Hot smoke is lighter than air → always rises.
Smoke is lighter than air; convection makes it rise upward regardless of the direction the stick points.
