Density and Buoyancy

Density is defined as...

• Centimeters cubed per mass of material

• Mass per unit volume of a material

• Flow rate of a substance

Tags

NGSS.MS-PS1-2

Looking at the image... can oak float in water? 

• Yes
• No

How do we calculate density? (with correct units!)

• D = m/v (in g/mL or g/cm3)
• D = v/m (in g/mL or g/cm2) 
• D=m/v (in mL/g or cm3/g) 

True or False: Volume is the amount of matter in a substance. Mass is the amount of space a substance takes up. 

• True
• False 

Archimedes' Principle states that... 

• The buoyant force acting on an object equals the volume of the fluid displaced by the object. 
• The buoyant force acting on an object equals the weight (force of gravity) of the fluid displaced by the object.
• The buoyant force acting on an object will always be equal. 

Which will result in positive buoyancy?

• When the buoyant force is greater than the force of gravity
• When the buoyant force is equal to the force of gravity
• When the buoyant force is less than the force of gravity

It refers to the amount of the space the object takes up.

• Volume

• Density

• Buoyancy

• Displaced water

If a material has particles that are packed together tightly and has few spaces in between, it has ....

• High density

• Low density

• Buoyancy

• Buoyant force

If a material has particles that are loosely packed together and has more spaces in between, it has....

• High density

• Low density

• Buoyancy

• Buoyant force

What is the upward push of a liquid on an object?

• Buoyant force

• Volume

• Displaced water

• Density