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chem exam 1
serenity g
| Term | Definition |
|---|---|
| back right corner | where are the fire extinguisher, fire blanket, eye wash, and first aid |
| code 1 | what to yell if someone gets hurt |
| lab cabinets | where is the goggles gloves and aprons |
| no | should you take anything out the lab |
| no | should you drink in lab |
| mass | amount of matter an object has |
| balance | the way the mass is measured |
| grams | the unit mass is measured with |
| tare | button to press to ignore the weight of massing tray |
| no | should you place heavy or hot items on a balance |
| volume | amount of space ab object takes up |
| 1 milliliter | 1 cubic centimeter |
| no | does a 150 ml beaker have graduations up to 150 ml |
| erlenmeyer | flask used for boiling liquids |
| droppers | name for ungraduated pipette |
| medicine droppers | graduated pipette |
| hot hands and beaker tongs | 2 ways to pick up a hot beaker |
| no | should you set a hot beaker on cold table |
| heat resistant mat | place to set a hot beaker |
| alcohol burner | type of burner used in the lab |
| mortar | bowl used for grinding and crushing |
| pestle | stick with mortar |
| tweezers | forceps |
| scientific meth | logical and orderly way to solve problems |
| 1st sci. meth step | state prob or quest. |
| 2nd step fir sci meth | research |
| 3rd SM step | hypothesis |
| 4th SM step | experiment |
| 5th SM step | analyze data |
| last SM step | draw conclusion |
| how many groups in experiment | 2 |
| control group | used for comparison |
| amount of variables tested | 1 |
| var. controlled by experimenter | indep. |
| name of var. changed bc of the experimenter | dep. |
| variables that stay same | constant |
| precision | how close measurements are to each other |
| precision is defined by | the closeness of a measurment |
| precision is determined by | instrument and technique |
| significant figures shows | how precise measurements are |
| measurments with numbers | quan. |
| measurments w/o numers | qual. |
| science | a body of knowledge and a method of gaining more knowledge |
| chemistry | study of matter and its changes |
| macroscopic | can be seen w naked eye |
| microscopic | microscope is needed to see it |
| submicroscopic | things that can't be seen even w a microscope |