click below
click below
Normal Size Small Size show me how
Phy. Sci. Words
vocabulary for physical science grade 8 SOL
Term | Definition |
---|---|
transparent | can see through |
constant speed | speed does NOT change |
ionic bond | metals lose valence electrons, nonmetals gain valence electrons |
covalent bond | atoms share valence electrons |
atomic number | number of protons in the nucleus |
Newton's 1st Law of Motion | law of inertia, objects at rest or in motion stay that way until an unbalanced force acts on it, The Seatbelt Law |
metalloid | on the stair steps, shiny or dull, semi-conductor |
Newtons 2nd Law of Motion | Force =Mass * Acceleration, it takes more force to accelerate a larger mass |
Newton's 3rd Law of Motion | Action/Reaction, for every action there is an equal and opposite reactions |
acceleration | object speeds up, slows down, or changes direction |
velocity | speed in a given direction |
speed | distance/time |
flammable | chemical property, ability to burn |
solvent | does the dissolving |
isotopes | atoms with the same amount of protons, different number of nuetrons |
freezing | liquid to a solid, loses heat energy |
corrosive | chemical property |
sublimation | solid to gas, gains heat energy, moth balls |
vaporization | liquid to a gas, gain heat energy |
solution | homogeneous mixture, one substance dissolved in another |
ductile | able to be pulled into a thin wire, physical property |
translucent | can see through it a little bit |
valence electrons | electrons on the outer most energy level |
explosive | chemical property |
volume | amount of space an object takes up |
solute | substance that gets dissolved |
insoluble | cannot dissolve |
atomic mass | average of all isotopes found in nature |
density | amount of mass in a given space, mass/volume |
neutrons | neutral in the nucleus |
compound | 2 or more different elements chemically combined, have a chemical formula |
opaque | can't see through it |
metals | left side of Periodic Table, shiny, good conductor, malleable, ductile, loses electrons in ionic bonding |
non-metal | right side of Periodic Table, dull, poor conductor, brittle, gains electrons during ionic bonding |
Family | vertical columns on PT, same number of valence electrons |
combustible | chemical property |
malleable | ability to be hammered into a thin wire, physical property |
mixture | two or more different substances not chemically combined |
protons | positive in the nucleus, number never changes |
mass | amount of matter in an object |
condensation | gas to liquid, loses heat energy |
heat | transfer of energy from one object to another |
termperature | moving atoms, faster motion=higher |
element | made of only 1 type of atom |
melting | solid to liquid, gain heat energy |
period | rows, same number of energy levels |
acid | pH of less than 7, litmus paper turns red, sour taste |
base | pH of more than 7, litmus paper turns blue, bitter taste |
nuetral | pH of 7, water |
has a density of 1 g/ml | water |
water | universal solvent because it can dissolve A LOT of substances |
motion | change in position |
size, shape, state | 3 S's of physical change |
kilometer | 1000 meters |
centimeter | 1/100 of a meter, 100 cm=1 meter |
millimeter | 1/1000 of a meter, 1000 mm = 1 meter |
homogeneous | mixture, looks the same throughout |
heterogeneous | you can see the different parts of the mixture |
atom | smallest part of an element |
molecule | smallest part of a compound |