| A | B |
|---|
| meter | measure of length |
| liter | measure of volume |
| gram | measure of mass |
| dependent variable | variables that would be present independently of the experiment ie time (x axis) |
| independent variable | variables manipulated by the experiment (y axis) what you measured |
| classifying | grouping items by similarity |
| Purpose of an experiment | To answer the question posed |
| Hypothesis | Educated guess because you do research |
| Control | only the variable tested can change |
| A control is necessary | to prove no other variables could have affected the result |
| Conclusion of an experiment | Accept or reject the hypothesis and why |
| Rate | distance divided by time |
| percent of volume | divide the GRAMS substance amount by the amount of solvent |
| percent mass | divide the ML of substance by the amount of solvent |
| Bunsen burners | hot plates to avoid risk of burns/fires |
| graduated cylinder | used for precise measurement (read measurement from bottom of the lens curve formed at the top) |
| balance | measuring mass |
| forseeability | anticipation that an event many occur |
| negligence | failure to exercise oridnary or reasonable care |
| Right to Know Law | science teachers must be informed of potentially toxic chemicals |
| Carcinogenic chemicals not allowed in schools | acrylonitriel, arsenic, asbestos, bensidine, benzene, cadmium compounds, chloroform, chromium compounds, ethylene oxide, ortho-toluidine, nickle powder mercury |
| Glassware care | rinse with didistilled water |
| Solutions made with | distilled water |
| Chemical storage | dry area according to reactibility |
| Acids | locked away separately |
| Fire department | help with safe disposal of chemicals |
| chromatography | separates substances such as plant pigments, molecules move quickly if small and slowly if large |
| spectrophotometry | uses percent of light absorbed to measure color change |
| Centrifugation | spinning substances at high speed. Denser settles to the bottom (separate blood into blood cells and plasma) |
| electrophoresis | uses electrical charges of molecules to separate them by size. DNA or proteins are pulled through a gel to either the positive or negative end of a gel box |
| Computer technology | collection and interpretation of data. Computer images, shared data through internet, MRI, CT |
| Satellites | comuunication, navigational abilities, sonar uses sound to locate objects, |
| Seismographs | record vibrations in the earth and allow us to measure earthquake activity |
