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Pressure
is the amount of force per unit area applied to an object's surface
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Atmospheric pressure
the ratio of the weight of all the air above you to surface area
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Fluid
is a liquid or a gas, anything that flows
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Buoyant force
is an upward force applied by a fluid on an object in the fluid
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Archimedes' principle
the weight of the fluid that an object displaces is equal to the buoyant force acting on the object
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Bernoulli's principle
states that the pressure of a fluid decreases when the speed of the fluid increases
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Drag fore
is a force that opposes the motion of an object through fluid
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Elevation
the distance above sea level
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Density
a measure of how compact the mass in a substance or object is