Wind is occur when the air is moving.
We used a burning candle and we moved it next to an open door,
What does happen?
The flame is moving in the direction of the wind: into the room, when the candle is up and out of the room, when the candle is down. That means that the air is moving and the warm air is up and the cold air is down. If we open a door, the air is moving quick and the candle is burnt up.
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