Chapter 1: Intro to Chemistry
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16 terms
Terms | Definitions |
|---|---|
 chemistry | the study of the composition of matter and the changes that matter undergoes |
| matter | that which has mass and occupies space |
| scientific method | a method of investigation involving observation and theory to test scientific hypotheses |
| observation(qualitative) | an observation made by using the senses |
| observation(quantitative) | measurements with numbers and units |
| prediction | what you thought would happen before preforming an experiment |
| hypothesis | why you thought your prediction would happen |
| experiment | the act of conducting a controlled test or investigation |
| law | simply describes what happens(does not explain why); often a mathematical equation |
| theory | developed after many experiments to explain how or why behaviors happen; often revised over time |
| independent variable | manipulated by the scientist; you decide what value you want |
| dependent variable | measured or observed variable |
| constant | all variables not being tested in the experiment |
| experimental control | standard for comparison; needed to draw a valid conclusion |
| multiple trials | preforming exactly the same experiment more than once keeping all conditions the same |
| International System of Units (SI) | Established in 1960, uses base units, derived units and prefixes. |
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