Absolute pressure|positive pressure measurements that start at no pressure at all
Area|the amount of surface in a given plane or two-dimensional shape
Atmospheric pressure|the pressure exerted on all things on Earth’s surface as a result of the weight of the atmosphere
Barometric pressure|the actual atmospheric pressure at a given place and time
Coefficient|A multiplier
Constant|an element in an equation with a fixed value
Exponent|a small figure or symbol placed above and to the right of another figure or symbol to show how many times the latter is to be multiplied by itself
Force|the weight of an object or fluid
Mass|the quanitity of matter present
Newton (N)|the amount of force required to accelerate one kilogram at a rate of one meter per second
Polygon|a shape formed when three or more straight lines are joined in a regular pattern
Unit|a definite standard of measure of dimension or quantity
Vacuum|any pressure that is less than the prevailing atmospheric pressure
Variable|an element of an equation that may change in value
Volume|the amount of space contained in a given three-dimensional shape