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# Post Test Review

### for use with physical science SLO post

TermDefinition
speed distance over time
velocity speed in a direction
m/s velocity units
acceleration change in velocity over time
m/s squared acceleration units
atomic number number of protons in an atom
mass number number protons plus neutrons in an atom
neutral atom has equal protons and electrons
ion charged atom, has fewer or more electrons
valence electron electron in the outer shell of an atom
group atoms in the same column - have same number of valence electrons
net force combination of all forces acting on an object
balanced forces object will either be at rest, or move at a constant velocity
acceleration change in speed or direction
friction force that opposes motion
static friction not moving
weight downward force due to gravity
inertia tendency of an object to stay at rest or stay in motion
Newton's first law an object in motion will stay in motion in a straight line and an object at rest will stay at rest, unless acted upon by a force
Newton's second law an unbalanced force acting on an object equals the object's mass times its acceleration
Newton's third law for every action force there is an equal and opposite reaction force
Joules units of work and energy
conduction energy transfer through collision of particles
convection energy transfer through fluids using currents
radiation energy transfer without matter
F=ma formula for force
Newton unit of force
GPE=mgh formula for gravitational potential energy
9.81 meters per second squared g, constant for gravity
wavelength distance between equal points, one full wave
gamma highest frequency EM waves, shortest wavelength
radio waves longest wavelength, lowest frequency EM waves
volt unit of electrical pressure
ohm unit of resistance
watt unit of power
endothermic energy is absorbed, surroundings become cooler in an endothermic reaction
exothermic energy is released, surroundings become warmer in an exothermic reaction
electron negatively charged particle
proton positively charged particle, found in the nucleus
neutron neutrally charged particle, found in the nucleus
covalent bond shares electrons
covalent bond bond between two nonmetals
ionic bond gains/loses electrons
ionic bond bond between metals and nonmetals
Created by: mrsriggs