Buoyancy and Density Quiz

Why does an iceberg float in the water?

• Icebergs weigh less than the water

• The water has more mass than icebergs

• Icebergs are less dense than the water

What is the approximate density of the icebergs floating in the picture above?

• 1.9g/cm³

• 0.5g/cm³

• 0.9g/cm³

A boat has a density of 0.4g/cm³. What percent of the boat would be above the water line?

• 60%

• 40%

• 10%

A rock has a weight of 5 pounds when attached to a spring scale. When the same rock is placed in the water it has a weight of 2 pounds. What is the name of the force that causes the rock to weigh less when it is placed in the water?

• Gravity Force

• Density Force

• Buoyant Force

The density of syrup is 1.3 g/mL. Objects would sink in the syrup if their density was:

• less than 1.3 g/mL

• more than 1.3 g/mL

• equal to 1.3 g/mL

What type of buoyancy does an object have if it sinks in water?

• Positive buoyancy

• Neutral buoyancy

• Negative buoyancy

What type of buoyancy does an object have if it floats in water?

• Positive buoyancy

• Neutral buoyancy

• Negative buoyancy

What type of buoyancy does an object have if it is suspended (does not float or sink) in water?

• Positive buoyancy

• Neutral buoyancy

• Negative buoyancy

The density of a block of aluminum is 2.7g/cm³. If the block of aluminum is heated, what happens to its density? (think about what happens to the molecules when heated...)

• Density decreases

• Density stays the same

• Density increases

The density of a block of aluminum is 2.7g/cm³. If the block of aluminum is heated, what happens to the molecules inside the aluminum?

• The molecules move slower and get closer together

• The molecules stop moving

• The molecules move faster and get farther apart