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Chapter 7 Key Terms
Science vocab words
13
Science
8th Grade
11/30/2007

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Term
Fluid
Definition
Any material that can flow and that takes the shape of its container
Term
Pressure
Definition
The ammount of force exerted on a given area.
Term
Pascal
Definition
The SI unit of pressure.
Term
Atmospheric Pressure
Definition
The pressure caused by the weight of the atmosphere.
Term
Density
Definition
The ammount of matter in a given space.
Term
Pascal's Principle
Definition
The priciple that states that a change in pressure at any point in an enclosed fluid is transmitted equally to all parts of that fluid.
Term
Buoyant Force
Definition
The upward force that fluids exert on all matter.
Term
Archimedes' Priciple
Definition
The principle that states that the buoyant force on an object in a fluid is an upward force equal to the weight of the volume of fluid that the object displaces.
Term
Bernoulli's Principle
Definition
The principle thaty states that as the speed of a moving fluid increases, its pressure decreases.
Term
Lift
Definition
An upward force on an object that opposes the downward pull of gravity.
Term
Thrust
Definition

The forward force produced by an airplane's engines.

Term
Drag
Definition
The force that opposes or restricts motion in a fluid.
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