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Science Vocabulary
Pressure
24
Physics
8th Grade
03/01/2016

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Term
Archimedes Principle
Definition
The relationship between buoyancy and displaced fluid: An immersed object is buoyed up by a force equal to the weight of the fluid it displaces.
Term
Boyle’s Law
Definition
At a constant temperature, the volume of a given quantity of gas is inversely proportional to the pressure upon the gas.
Term
Buoyancy
Definition
An upward force acting on an immersed or floating body by the supporting fluid.
Term
Buoyant Force
Definition
The net upward force exerted by a fluid on a submerged object.
Term
Density
Definition
A property of a substance, equal to the mass divided by the volume; commonly thought of as the lightness or heaviness of a substance.
Term
Displaced
Definition
Term applied to fluid that is moved out of the way when an object is placed in the fluid.
Term
Elastic Potential Energy
Definition
Potential energy due to tension – either stretch (rubber bands, etc.) or
compression (springs, etc.).
Term
Energy
Definition
The ability to do work. Appears in many forms, all of which are either kinetic or potential.
Term
Equilibrium
Definition
A state of balance between opposing forces.
Term
Fluid
Definition
Anything that flows; any liquid or gas.
Term
Force
Definition
A push or a pull. An influence on a body or system, causing or tending to cause a change in movement or shape.
Term
Gravity
Definition
A pulling force exerted by any mass upon another.
Term
Inertia
Definition
The tendency of matter to remain at rest if at rest, or, if moving, to keep moving in the same direction, unless affected by an outside (or unbalanced) force.
Term
Kinetic Energy (KE)
Definition
Energy of motion. Includes heat, sound, and light (motion of molecules).
Term
Mass
Definition
The amount of matter that is contained by an object.
Term
Momentum
Definition
The quantity of motion of a moving object, equal to the product of its mass and its velocity.
Term
Neutral Buoyancy
Definition
Exists when the weight of the body is equal to the weight of an equal volume of the displaced fluid. The body remains suspended – neither rising nor sinking – unless acted upon by an outside force.
Term
Potential Energy (PE)
Definition
Energy of position; energy that is stored and held in readiness. Includes chemical energy, such as fossil fuels, electric batteries, and the food we eat.
Term
Pressure
Definition
The force per unit of surface area; exerted perpendicular to the surface; measured in Pascals.
Term
Principle of Flotation
Definition
A floating object displaces a weight of fluid equal to its own weight.
Term
Speed
Definition
How fast an object is moving. The distance traveled over time.
Term
Velocity
Definition
The speed of something in a given direction.
Term
Volume
Definition
The amount of space enclosed by a shape or object; how much 3-dimensional space (length, width, and height) it occupies.
Term
Weight
Definition
The downward force caused by gravity on an object.
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