Archimedes, Buoyancy, & Density

An object should float in a liquid if...

• Its denser than the liquid

• It's the same density as the liquid

• It's less dense than the liquid

Label the two arrows with the correct force

a

b

Gravity

Density

Displacement

Buoyancy

Tags

NGSS.MS-PS2-2

NGSS.MS-PS2-4

Why does the Screw SINK in Honey?

• The screw is less dense than the honey

• The screw is more dense than the honey

• the screw has the same density as the honey

When an object is immersed in a fluid, it pushes the fluid out of the way and takes its place. This is ...

• Gravity

• Buoyancy

• Density

• Displacement

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. 

What is buoyant force?

• An upward force exerted by fluids on an object.
• An downward force exerted by fluids on an object.

Tags

NGSS.MS-PS2-2

Jack has a rock. The rock has a mass of 14g and a volume of 2cm³. What is the density of the rock?

• 7 mL
• 7 g/cm³
• 28 g/cm³
• 1/7 g/cm³

A basketball that has a density of 0.86 g/ml has a volume of 50 ml. What is the mass of the object?

• 43 g

• 0.0172 g

• 58.14 g

• 5 g

If an object has a density of 1.03 g/ml, will it float or sink in water? (Assume fresh water)

• True

• False

• Float

• Sink

Answer explanation

The density of fresh water is 1.0g/cm^3. This is LESS than the density of the object. Therefore, the object will sink.

If an object has ​ ​ (a)   buoyancy, It will float

If an object has ​ (b)   buoyancy, it will sink

If an object has ​ (c)   buoyancy, it will "flink"

• positive
• negative
• neutral
• greater
• less
• equal
• Archimedes'