While boiling water in a kettle, Rey noticed that there was smoke and steam coming from the spout of the kettle. He asked his mother, "Why did the smoke and steam rise upward"? What do you think will be the mother’s answer? The smoke and steam rise up____.
Answer (1)
cause of a convection current, the hot air rises and the cold air sinks and then will become hot again. This happens because cold air is heavier and hot air is lighter, and as it rises, the hot air becomes cold air and then sinks.
