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6Sciencechapt7

Vocabulary 6th Grade Chapter 7

TermDefinition
Fluid Nonsolid state of matter in which the atoms or molecules are free to move past each other, as in a gas or liquid
Pressure Amount of force exerted per unit area of a surface
Pascal SI unit of pressure
Atmospheric Pressure Pressure caused by the weight of the atmosphere
Buoyant Force Upward force that keeps an object immersed in or floating on a liquid
Archimedes' Principle 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
Bernoulli's Principle Principle that states that the pressure in a fluid decreases as the fluid's velocity increases
Thrust Pushing or pulling force exerted by the engine of an aircraft or rocket
Drag Force parallel to the velocity of the flow; it opposes the direction of an aircraft and, in combination with thrust, determines the speed of the aircraft
Pascal's Principle Principle that states that a fluid in equilibrium contained in a vessel exerts a pressure of equal intensity in all directions
Lift Upward force on an object that moves in a fluid
Atmosphere The layer of nitrogen, oxygen, and other gasses that surrounds Earth
Density The amount of matter in a given volume, or mass per unit volume
Created by: jean2454