| A | B |
|---|
| chemistry | the study of matter and its changes |
| substance | also known as a chemical; has a uniform composition |
| mass | the amount of matter in a substance |
| model | a tool used to represent something |
| volume | the amount of space a substance takes up |
| density | the amount of mass per unit volume |
| milliliter | commonly used unit of volume |
| cubic centimeter | commonly used unit of volume |
| weight | measure of gravity on an object |
| gram | commonly used unit of mass |
| liter | larger than a milliliter; commonly used unit of volume |
| observation | first step of the scientific method |
| qualitative data | data that describes a quality, such as color, smell, taste, etc. |
| quantitative data | data made with a measurement; must have number and unit |
| independent variable | the one thing that is changed in an experiment |
| scientific method | systematic approach to problem solving |
| theory | hypothesis that has been repeatedly supported by experiments |
| law | generally accepted fact |
| hypothesis | testable statement, usually in "if...then" format |
| dependent variable | what changes as a result of the independent variable |
| applied research | research done to solve a problem |
| pure research | research done for pure knowledge |
