Density Physics

True or False:  The density of a specific type of material never changes.  

• True
• False

I have two objects with the same volume but different masses.  Which object will be more dense?

• The object with less weight.
• The object with more weight.
• The object with more mass.
• The object with less mass.

What is the formula for density?

• density = mass x volume
• density = mass / volume
• density = mass + volume
• density = mass - volume

The tool used to measure the mass of a substance or object is a ______________.

• balance
• graduated cylinder
• ruler
• thermometer

Put the liquids in order from most dense to least dense?

• 4, 3, 2, 1
• 1, 2, 3, 4
• 3, 4, 2, 1, 
• 4, 3, 1, 2

As a flame heats air in a hot air balloon it starts to rise. Which of the following statements correctly explains the chemistry behind why this happens.

• The air molecules become more dense & more bouyant than the cooler air in the surrounding atmosphere.

• The volume of the gas increases because the molecules in the gas are spaced further apart.

• The mass of the of the gas increases causing density to increase & buoyancy to decrease.

A can of Coke will sink in a bowl of water.  A can of Diet Coke will float in a bowl of water.  What does this tell you about the density of the Diet Coke?

• it is bigger than 1
• it is smaller than 1
• it is equal to 1
• it is equal to -1

Why do ice cubes float in a  glass of water?

• the ice cubes are more dense than the water
• the water is more dense than the ice cubes
• the water is more dense than the glass
• the ice is more dense than the glass

Will an object with a density of 1.01 g/cm3 float or sink when in pure water?

• float

• sink

A brick sinks in water while a wooden block of the same size floats.  This is because the brick has a

• lower volume than the wooden block
• lower density than the wooden block
• higher volume than the wooden block
• higher density than the wooden block