Understanding Air Pressure and Buoyancy

What happens to the straw when it is initially placed in the bottle?

• It floats due to the air inside.

• It sinks to the bottom.

• It dissolves in the water.

• It breaks into pieces.

How does squeezing the bottle affect the air pressure inside?

• It makes the air pressure fluctuate.

• It decreases the air pressure.

• It has no effect on the air pressure.

• It increases the air pressure.

What causes the straw to sink when the bottle is squeezed?

• The straw becomes lighter.

• The water evaporates.

• The increased air pressure pushes water into the straw.

• The straw is pulled down by gravity.

What happens to the straw when the pressure on the bottle is released?

• It remains at the bottom.

• It dissolves in the water.

• It floats back to the top.

• It breaks apart.

Which of the following is NOT needed for the experiment?

• A balloon

• A straw

• A paper clip

• A plastic bottle