Buoyancy

1

Buoyancy applies to all of the following substances, except:

• Oxygen

• Clay

• Milk

• Saltwater

Tags

NGSS.MS-PS2-2

A rock dropped into a glass of water raises the water level by 40 milliliters. What can you infer about the rock?

• It has a mass of 40 grams

• It has a desity of 40 grams per milliliter

• It has a volume of 40 milliliters

• It has a weight of 40 pounds

If Moby weighs 570 pounds on land, and he displaces 320 pounds of water, how much does he weigh underwater?

• 730 pounds

• 490 pounds

• 320 pounds

• 250 pounds

A tennis ball is placed in a bowl filled to the brim with water. Which of the following statements is true?

• The water that spills out weighs more than the ball

• The water that spills out has less volume than the ball

• The water that spills out weighs less than the ball

• Since the ball floats, no water spills out

Density is the relationship between which two quantities?

• Mass and volume

• Mass and weight

• Volume and weight

• Mass and buoyant force

How does an object's density affect the buoyant force acting on it?

• The more dense the object, the greater the buoyant force

• The less dense the object, the greater the buoyant force

• Density is equivalent to buoyant force

• Density has no effect on buoyant force

A submerged submarine that remains at a constant depth has _____ buoyancy.

• Positive

• Negative

• Neutral

• No

A fully loaded cruise ship leaves port weighing 50,000 tons. How much water does it displace?

• Exactly 50,000 tons

• More than 50,000 tons

• Less than 50,000 tons

• 50,000 gallons

Tags

NGSS.MS-ESS2-4

Hot air balloons rise when the air inside the balloon is heated. Which statement must be false?

• Hot air is less dense than cool air

• The volume of the balloon is equal to the volume of the air it displaces

• As the air in the balloon cools, the density decreases

• The air in the balloon weighs more than the air it displaces

Tags

NGSS.MS-PS3-4

What is buoyant force?

• An upward force exerted by fluids on an object.
• An downward force exerted by fluids on an object.