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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 |