Across
- 5. to the Arrhenius model, any sub stance that produces hydroxide ions (OH-) in an aqueous solution. According to the BrønstedLowry model, any substance that accepts hydrogen ions (protons, or H+)
- 7. assessment of the exactness of a measurement. A more precise measurement has more known digits than a less precise measurement of the same quantity. The fineness of an instrument's scale markings determines the maximum precision of a measurement
- 8. The global scientific metric system. The abbreviation stands for the French name System Inter national d'Unités.
- 10. assessment of the measurement error. An indication of how close a measurement is to its acceptable value. A smaller error means a more ac curate measurement.
- 11. system/A system of measurement in which all units of a given dimension are related to each other by powers of 10. The main metric system used today is the SI.
Down
- 1. space enclosed or occupied by an object or within the boundaries of a physical system. Scientists derive volumetric units from the cube of units of length.
- 2. measure of the earth's gravity acting on the matter in an object. Weight is a force measured in newtons
- 3. notation/A convenient way to express very large or small numbers. We write the notation in the form M × 10n, where M is a number greater than or equal to 1 and less than 10, and n is a positive or negative integer.
- 4. digit/ A digit in a measurement used to communicate the precision of the measurement. The significant digits in a measurement are all the digits known from the instrument scale plus one estimated digit determined by the user.
- 6. assessment of the random errors associated with a series of measurements. Results showing small random errors around an average value for a given measurement have good repeat ability.
- 9. measure of the inertia of matter in an object or within the boundaries of a physical system.