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Chapter 4

8th Grade Physical Science

TermDefinition
Atmospheric Pressure Ratio of the weight of all the air above you to your surface area.
Dense Describes the measure of the ratio of mass to volume.
Elevation Height above sea level.
Fluid Any substance that can flow and take the shape of the container that holds it.
Pressure Amount of force per unit area applied to an object's surface.
Archimedes' Principle States that the weight of the fluid that the object displaces is equal to the buoyant force acting on the object.
Buoyant Force Upward force applied by a fluid on an object in the fluid.
Bernoulli's Principle States that the pressure of a fluid decreases when the speed of that fluid increases.
Drag Force Force that opposes the motion through a fluid.
Pascal's Principlle States that when pressure is applied to a fluid in a closed container, the pressure increases by the same amount everywhere in the container.
Created by: gstubblefield
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