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science vocab

acceleration the change in an object's speed or direction over time
buoyancy an object's ability to float
compound machine a machine made of two or more simple machines
force a push or pull
free fall the hypothetical fall of a body such that the only force acting upon it is that of gravity
friction surface resistance to relative motion, as of a body sliding or rolling
gravity the force of attraction by which terrestrial bodies tend to fall toward the center of the earth
inclined plane one of the simple machines, a plane surface inclined to a higher level
inertia an object's tendency to resist a change in motion
lever a rigid bar that pivots about one point and that is used to move an object at a second point by a force applied at a third
lift to move or bring (something) upward from the ground or other support to a higher position; hoist
magnetic force a force produced by interacting magnetic poles
mass the quantity of matter in an object
momentum force or speed of movement; impetus, as of a physical object or course of events
motion the action or process of moving or of changing place or position; movement
Newton's laws of motion the rules and formulas for force, motion, acceleration, and mass
pressure the exertion of force upon a surface by an object, fluid
pulley a wheel, with a grooved rim for carrying a line, that turns in a frame or block and serves to change the direction of or to transmit force
screw a simple machine that is an inclined plane wrapped around a cylinder to form a spiral
simple machine a machine that changes the amount, distance, or direction of a force needed to do work
speed rapidity in moving, going, traveling, proceeding, or performing; swiftness; celerity
wedge a piece of hard material with two principal faces meeting in a sharply acute angle, for raising, holding, or splitting objects by applying a pounding or driving force, as from a hammer
weight the force that gravitation exerts upon a body
wheel and axle a simple machine consisting of two attached circular objects of different sizes that rotate together
work a force applied to an object and the object moves as a result of the force
Created by: AHoldeman