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chemistry
chemistry vocab test 1
| Question | Answer |
|---|---|
| matter | anything that has mass and takes up space |
| mass | amount of matter the object contains |
| physical property | quality or condition of a substance that can be observed or measured with out changing the substances composition |
| 7 words describing physical property | color, solubility, odor, hardness, density, melting point, and boiling point |
| states of matter | the physical state of a substance is the physical property of that substance |
| solid | matter that has a definite shape and volume, molecules compact |
| liquid | form of matter that flows, has a fixed volume and takes the shape of its container, molecules slide past each other |
| gas | a form of matter that takes both the shape and volume of its container, space between molecules |
| vapor | the gaseous state of a substance that is generally a liquid or a solid at room temperature |
| physical change | a change that alters a material without changing its composition |
| 12 words for physical change | boil, freeze, dissolve, melt, condense, break, split, crack, grind, cut, crush and bend |
| mixture | PHYSICAL blend of two or more substances |
| substance | matter that has a uniform and definite composition, contain only one type of matter, pure |
| heterogeneous mixture | one that is not uniform in composition |
| homogeneous mixture | one that has a completely uniform composition |
| solution | a homogeneous mixture |
| solute | dissolved particles in a solution, usually the smaller amount between the two parts of the solution is the solute |
| solvent | the dissolving medium |
| phase | any part of a system with uniform composition and properties |
| element | the simplest form of matter that can exist under normal laboratory conditions |
| compound | substances that can be separated into simpler substances only by chemical means |
| chemical reaction | the changing of substances to other substances by the breaking of bonds in reactants and the formation of bonds in products, cooking and baking is chemical |
| reactant | the starting substances in a chemical reaction |
| product | the substances formed in a chemical reactants |
| chemical property | the ability of a substance to undergo a chemical reaction and to form new substances |
| chemical change | results in a change in chemical composition of the substances involved |
| 7 words for chemical change | burn, rot, rust, decompose, ferment, explode, corrode |
| 4 evidences of chemical change | gas produced, color change, precipitate forms, energy change |
| law of conservation of mass | mass can be neither created nor destroyed in an ordinary chemical or physical process |
| exothermic | a heat dissipating process |
| endothermic | a heat absorbing process |
| precision | measure of how close a series of measurements are to one another |
| accuracy | closeness of a measurement to the true value of what is being measured |
Created by:
lbanana217