Archimedes' Principle
States that the buoyant force on an object is equal to the volume of fluid it displaces.
Buoyancy
The upward force exerted by a fluid on an object that is placed in it.
Density
The mass per unit volume of an object.
Displacement
The amount of fluid that is "pushed aside" by an object placed in it.
Fluid
A substance that has definite shape and flows.
Mass
The amount of matter or "stuff" in an object.
Negative Buoyancy
This occurs when the buoyant force is less than the downward pressure and the object sinks.
Positive Buoyancy
This occurs when the buoyant force is greater than the downward pressure and the object floats.
Neutral Buoyancy
This occurs when the buoyant force and downward pressure are equal and the object hovers.
Pressure
The force per unit area exerted on an object.
Volume
The amount of space an object takes up.