Chemistry Crossword

2. a process involving one or more substances changing into new substances; also called a chemical reaction
3. a transition of matter from one state to another
9. a physical property that remains the same no matter how much of a substance is present
10. a systematic approach to problem solving that uses conversion factors to move from one unit to another
11. the number of all known digits reported in measurements plus one estimated digit
12. the ablility or inablilty of a substance to combine with or change into one or more new substances
13. a ratio of equivalent used to express the same quantity in different units; is always equal to 1 and changes the units of a quantity without changing its value
14. refers to how close a measured value is to an accepted value

1. a characteristic of matter that can be observed or measured without changing the sample’s compisition-for example, density, color, taste, hardness, and melting point
4. a physical property, such as mass, length, and volume, that is dependent upon the amount of substance present
5. a defined unit in a system of measurement that is based on an object or event in the physical world and is independent of other units
6. gaseous state of a substance that is a liquid or a solid at room temperature
7. a type of change that alters the physical properties of a substance but does not change its composition
8. refers to how close a series of measurement are to one another; precise measurements show little variation over a series of trials but might not be accurate
10. the amount of mass per unit volume; a physical property