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Post Test Review
for use with physical science SLO post
| Term | Definition |
|---|---|
| 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
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