Pressure, Density, & Buoyancy

During the tin can experiment, water came out with more force from which hole?

• The top hole because the pressure at the top of the can was greatest.
• The middle hole because the water from the top and bottom of the can was meeting at the center to push water out with the greatest force.
• The bottom hole because gravity was pulling the water downward and had the most density, forcing water out the greatest amount.
• All of the holes had water coming out evenly.

When we place an index card over a cup of water and turned it upside down, water stayed in the cup and did not spill out because…

• The pressure on the inside of the cup was greater, holding the water in.
• The pressure on the outside of the cup was greater, pushing up on the card.
• The pressure was even on the inside and outside of the cup.
• The density of the water held the water and index card in place.

Pressure at the bottom of the ocean is greatest because:

• The water is most dense at the bottom.
• The water is least dense at the bottom.
• The water is buoyant at the bottom.

Inside the jar, we added several liquids to test density. The liquids that were most dense were at the _________ of the jar and the liquids that were least dense were at the __________.

• Top; bottom
• Middle; top
• Bottom; top
• The density was the same throughout.

Why did the leaf float at the top of the jar?

• The leaf was more dense than most liquids.
• The leaf displaced a lot of water.
• The leaf did not float at the top.
• The leaf was less dense than most liquids.

If the mass of an object is greater than the buoyant force, the object will:

• Float
• Sink

When you hold an object in the water,

• Water is displaced and rises
• Water is displaced and decreases
• The buoyant force pushes down on the object