Density & Buoyancy

Density is defined as...

• Centimeters cubed per mass of substance
• Mass per unit volume of a substance
• Flow rate of a substance

Tags

NGSS.MS-PS1-2

If the mass of an object is 6kg on earth.  what would the mass be on the moon?

• 6kg
• 0kg
• 1kg
• 13kg

The formula for density is...

• mass/ acceleration
• volume/ mass
• mass/ volume
• none

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) 

Tags

NGSS.MS-PS1-1

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

• Yes
• No

Buoyancy is the tendency for objects to float in a fluid. We consider buoyancy the...

• Un-gravity force 
• Anti-gravity force
• Gravitational pull
• Downwards pull on an object

Tags

NGSS.MS-PS2-2

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

• True
• False 

Tags

NGSS.MS-PS1-5

Swim bladders and ballistic tanks in a submarine serve to control the ________________ of a fish and a submarine. 

• Buoyant force
• Neutral buoyancy 
• Average density

True or False: Buoyancy is an upwards force measured in Newtons. 

• 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.