Subscribe to our newsletter. Grab a bottle of warmed bubble mixture, take your warm breath, and go outside to send hot air bubbles up into the cold sky.
Cold air is heavier than warm air.
Air rises as it gets warm and cold air moves in to take its place. This causes currents of air to move around inside as well as out of doors. To show how this happens, we will use a warmed bubble solution and our own warm body air. The bubbles we blow on a cold day will float upward as the warm air inside rises. Go outside and blow bubbles.