| Term | Definition |
| observation | the gathering of information by noting facts or occurences; uses your senses |
| inference | an educated guess based on what has been observed |
| quantitative | numbers or amounts |
| qualitative | qualities; descriptions, can be used to identify the properties of something |
| properties | characteristics that distinguish one thing from another |
| metric system | the universal system of measuremnt used in science |
| graduated cylinder | the tool used to measure volume |
| meter stick | the tool used to measure length |
| balance | the tool used to measure mass |
| gram | the unit used to measure mass |
| liter | the unit to measure volume |
| meter | the unit used to measure length |