Understanding Air Pressure and Surface Tension

What are the two main factors that prevent water from flowing out of the bottle when the hole is covered?

• Gravity and surface tension

• Surface tension and air pressure

• Air pressure and gravity

• Air pressure and temperature

Why does the air outside the bottle try to get inside?

• Because the air inside is at a lower pressure

• Because the air inside is at a higher pressure

• Because the air inside is moving faster

• Because the air inside is warmer

What prevents air from sneaking inside the bottle through the hole?

• The hole is too small

• The air inside is too cold

• The water is too dense

• The bottle is sealed tightly

How does surface tension help in preventing water from leaking out?

• By increasing the water's temperature

• By binding water molecules together

• By decreasing the water's density

• By increasing the water's volume

What happens when the hand is removed from the hole in the bottle?

• The surface tension decreases

• The air enters and pushes the water out

• The air pressure inside the bottle increases

• The water stays inside due to gravity