1. What’s Going On? AIR water level is low Air bubbles push the water level up AIR the water pushed up is the SAME SIZE as the bubble = = Bubble push Same size When bubbles rise, water is falling down around them, pushing them up AIR Larger bubbles = more water pushing the bubbles up air AIR so they rise faster!

2. Water Level

3. air But up close not much air pushed down This is the Bernoulli Effect What’s Going On? If the air hits the saucer’s edge just right, the air swings around the edge with a large force because of You know that if you push water behind you with a large force, you can swim upstream, even if the current is flowing against you LOTS of air pushed down What about And the saucer floats! If the saucer is far away Air swings around the edge with such a strong force that it overcomes the fan and floats the saucer