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CHEM REVIEW
  • Janelle A. Montefalco

  • 問題数 25 • 9/27/2023

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    問題一覧

  • 1

    is made up of a number and a unit

    measurement

  • 2

    comprises units of mile, yard, foot, gallon, quarts, inch, and pound

    english system

  • 3

    constitutes units based on powers of 10 (preferred system to be used in science)

    metric system

  • 4

    it is built upon 7 metric units, which are called ___ (2 ans pls)

    international system of units, base units

  • 5

    combination of two or more base units is called

    derived unit

  • 6

    is a letter or group of letters added at the beginning of base word to change its meaning

    prefix

  • 7

    can be used to make a new unit larger or smaller

    unit prefix

  • 8

    word or letters that precede a base unit in the SI unit. they are used to indicate how higher or lower the value of a unit is as compared with the base unit

    SI prefixes

  • 9

    is the quantitative measure of the hotness and coldness

    temperature

  • 10

    in 1724, ____ proposed the use of fahrenheit scale

    daniel gabriel fahrenheit

  • 11

    He introduced by ___ during the 1740s, Celsius

    anders celsius

  • 12

    simplified expression for large or very small number

    scientific notation

  • 13

    digits that are considered in a measurement taken, whether with great or little degree of certainty

    significant figure

  • 14

    magnitude of a physical quantity that may vary as a non-standard unit or is definite as a standard unit

    unit

  • 15

    units of measurements not typically used, length of an arm, finger, footstep and many more

    non-standard unit

  • 16

    value that is fixed and cannot be changed. it is needed to have uniformity in measurement

    standard unit

  • 17

    measurements are done for at least three trials

    uncertainties in measurement

  • 18

    qualitative term used in determining the degree of conformity of a test result to a true or accepted value

    accuracy

  • 19

    pertains to the consistency of achieving the same results repeatedly even if the value is far from the true value

    precision

  • 20

    the ones that the measuring instrument can give you

    certain digits or exact digits

  • 21

    are the ones that you estimate. the smallest mark division in the measuring instrument

    uncertain digits

  • 22

    are the fundamental units of measurement from which other units can be derived

    base units

  • 23

    it was proposed by ___ who was also known as lord kelvin (2ans pls)

    kelvin scale, william thomson

  • 24

    rankine scale was proposed by ___

    william john macquorn rankine

  • 25

    the smallest mark division in the measuring instrument

    least count