Y9 Buoyancy

Density is the relationship between which two quantities?

• Mass and volume

• Mass and weight

• Volume and weight

• Mass and buoyant force

The upward force acting on an object submerged in a fluid is called...

(a)  

Put the descriptors into the correct categories: Buoyant Force or Weight.

Groups:

(a) Buoyant force

,

(b) Weight

• Acts downward

• Acts upward

• Caused by displaced fluid

• Caused by gravity

• Depends on volume

• Depends on mass

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 density of 40 grams per milliliter

• It has a volume of 40 milliliters

• It has a weight of 40 pounds

The weight of an object measured while it is in a fluid is called its (a)   .

A submerged object displaced 50 ml of water. What is the volume of the object?

• 25 ml

• 50 ml

• 100 ml

• 125 ml

A student measures the weight of an object in air and again when it is fully submerged in water. Match the measured values to the correct quantities.

• 3.0 N

• Apparent weight of the object

• 9.0 N

• Mass of the object

• 6.0 N

• Buoyant force

• 0.9 kg

• Actual weight of the object

The fluid that moves out of the way when an object is submerged is described as (a)   .

A student submerges an object in water and measures the weight of the displaced water. What is the actual weight of the object?

• 1.5 N

• 3.5 N

• 5.0 N

• 6.5 N

A student weighs an object in air and then again while it is submerged in water. What is the weight of the displaced water?

• 8.5 N

• 6.5 N

• 2.0 N

• 15.0 N