| A | B |
|---|
| physical change | any change that alters the form or appearance of matter but does not make any substance in the matter into a different substance |
| chemical change | change in matter that produces one or more new substances |
| chemical reaction | another name for a chemical change |
| chemical property | property that tells how a substance changes into a new substance |
| flammability | ability of a substance to burn |
| mass, weight, volume, density | four general properties of matter |
| pungent | strong sharp smell |
| soluble | dissolves or breaks down in another substance |
| malleability | property that describes how material can be hammered or rolled into flat sheets |
| viscous | resistance to flowing |
| corrosive | chemical reaction that wears away a metal element |
| suspension | homogeneous mixture in which small particles of liquid or gas will sette out over time |
| milk, fog, smoke glue | examples of colloids |
| salad, tacos, soil, chex mix, granite | examples of a heterogeneous mixture |
| salt water, iced tea, brass, soda | examples of solutions |
| solution | mixture in which particles are too small to scatter light |
| atomic mass | sum of protons and neutrons in the nucleus of an atom |
| atomic number | number of protons in the nucleus |
| mixture | two or more substances mixed together but not chemically combined |
| fireworks, digestion of food, burning match, rust, leaves changing color in the fall | examples of chemical changes |
| mowed lawn, melted ice, shattering of glass, dissolving salt in water | examples of physical changes |
| solid, liquid, gas, plasma | 4 states of matter |
| plasma | state of matter that takes on form of gas, like a cloud and acts like a whole rather than individual atoms, not naturally found on the Earth, sun contains this |
| solid | state of matter that has a definite shape and volume |
| gas | state of matter that does not have a definite shape or volume |
| liquid | state of matter that had definite volume but no definite shape |
| amorphous solid | type of solid that has no specific melting point and acts like a liquid |
| crystalline | type of solid that is arranged in a regular repeating pattern |
| glass, wax, tar | examples of amorphous solids |
| sublimation | phase change in which the substance changes from a solid to a gas; ex. dry ice |
| surface tension | type of tension in which there is an inward pull of molecules |
| molecule | two or more atoms chemically combined |
| compound | two or more elements chemically combined |
| iron, cobalt, nickel | three elements that are magnetic |
| matter | anything that has mass and takes up space |
| homogeneous | type of mixture in which it appears the same throughout |
| heterogeneous | mixture in which pure substances are unevenly distributed throughout the mixture |
| loss or gain of heat energy | phase changes are accompanied by these 2 things |
| mass | measurement of how much matter an object contains |
| pressure of air above the substance | boiling point is affected by this |
| ductile | ability of a substance to be made into thin wire |
| freezing | phase change from a liquid to a solid |
| substance | single kind of matter that is pure with a specific set of properties |
| phase change | temperature change in a substance |
| chemical | type of change that involves a change in termperature and/or release of gas |
| gas | state of matter that changes its volume most easily |
| condensation | opposite of vaporization |
| gas | phase that requires the greatest amount of energy |
| element | substance that cannot be broken down chemically into other substances |
| pure substances and mixtures | matter is made up of what two main things |
| solutions, colloids | 2 types of homogeneous mixtures |
| suspension | type of heterogeneous mixture |
| fluid | substance that flows |
| elements, compounds | two types of pure substances |
| mixture | two or more substances are combined but each retains most of its properties |
| vaporization | liquid becoming a gas |
