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SI Units Flashcards: 7 Base Units & 22 Named Derived Units

Practice all 7 SI base units and 22 derived units with special names: quantities, symbols, and base-unit expressions in one installable deck.

Door Open Study Contributor

Over dit deck

Most SI lists are easy to scan and awkward to recall. These 110 text-only cards turn the complete core into small retrieval tasks: all seven base units and all 22 derived units with special names and symbols.

What the cards practice

  • Quantity ↔ unit and symbol: recall each base quantity and every named derived quantity in both directions.

  • Named unit ↔ coherent base-unit expression: expand all 22 special names, then reverse the mapping with the quantity supplied whenever an expression is shared.

  • Notation and distinctions: keep case, spacing, symbol grammar, Hz/Bq, Gy/Sv, rad/sr, and kelvin/degree Celsius intervals straight.

The deck leaves out prefixes, conversions, non-SI units, unnamed derived units, significant figures, uncertainty, laboratory procedures, historical definitions, defining-constant values, and proprietary exam material. Expression-to-unit prompts always state the quantity, so shared expressions such as s⁻¹ and m²·s⁻² stay unambiguous.

The sequence establishes the seven base units first. It then alternates the 22 named units with a deterministic stride before moving from identity recall to base-unit expressions. Related directions and easy-to-confuse units stay at least three unrelated cards apart; the review scheduler handles longer-term spacing after installation.

Facts were checked against the BIPM SI Brochure, 9th edition, version 4.01 and NIST SP 330 §2, with notation checked against NIST SP 330 §5. The 2026 BIPM edition expresses radian and steradian as unit one; this deck follows that current form. No source prose, third-party deck text, or exam content was copied.

An AI tool helped draft and sequence the cards and generated the cover. Every final front and back was manually checked against the official SI tables. The original questions, answers, selection, sequence, metadata, and cover are shared under CC0 1.0 to the extent those elements can be dedicated; the underlying SI facts remain common knowledge.

Kaarten in dit deck

  1. Kaart 1

    Vraag

    What is the SI base unit for time?

    Antwoord

    second (s).

  2. Kaart 2

    Vraag

    What is the SI base unit for length?

    Antwoord

    metre (m).

  3. Kaart 3

    Vraag

    What is the SI base unit for mass?

    Antwoord

    kilogram (kg).

  4. Kaart 4

    Vraag

    What is the SI base unit for electric current?

    Antwoord

    ampere (A).

  5. Kaart 5

    Vraag

    What is the SI base unit for thermodynamic temperature?

    Antwoord

    kelvin (K).

  6. Kaart 6

    Vraag

    What is the SI base unit for amount of substance?

    Antwoord

    mole (mol).

  7. Kaart 7

    Vraag

    What is the SI base unit for luminous intensity?

    Antwoord

    candela (cd).

  8. Kaart 8

    Vraag

    Which SI base quantity uses the second (s)?

    Antwoord

    Time.

  9. Kaart 9

    Vraag

    Which SI base quantity uses the metre (m)?

    Antwoord

    Length.

  10. Kaart 10

    Vraag

    Which SI base quantity uses the kilogram (kg)?

    Antwoord

    Mass.

  11. Kaart 11

    Vraag

    Which SI base quantity uses the ampere (A)?

    Antwoord

    Electric current.

  12. Kaart 12

    Vraag

    Which SI base quantity uses the kelvin (K)?

    Antwoord

    Thermodynamic temperature.

  13. Kaart 13

    Vraag

    Which SI base quantity uses the mole (mol)?

    Antwoord

    Amount of substance.

  14. Kaart 14

    Vraag

    Which SI base quantity uses the candela (cd)?

    Antwoord

    Luminous intensity.

  15. Kaart 15

    Vraag

    Which SI unit with a special name is used for plane angle?

    Antwoord

    radian (rad).

  16. Kaart 16

    Vraag

    Which SI unit with a special name is used for energy, work, or amount of heat?

    Antwoord

    joule (J).

  17. Kaart 17

    Vraag

    Which SI unit with a special name is used for electric resistance?

    Antwoord

    ohm (Ω).

  18. Kaart 18

    Vraag

    Which SI unit with a special name is used for Celsius temperature?

    Antwoord

    degree Celsius (°C).

  19. Kaart 19

    Vraag

    Which SI unit with a special name is used for dose equivalent?

    Antwoord

    sievert (Sv).

  20. Kaart 20

    Vraag

    Which SI unit with a special name is used for force?

    Antwoord

    newton (N).

  21. Kaart 21

    Vraag

    Which SI unit with a special name is used for electric potential difference?

    Antwoord

    volt (V).

  22. Kaart 22

    Vraag

    Which SI unit with a special name is used for magnetic flux density?

    Antwoord

    tesla (T).

  23. Kaart 23

    Vraag

    Which SI unit with a special name is used for activity referred to a radionuclide?

    Antwoord

    becquerel (Bq).

  24. Kaart 24

    Vraag

    Which SI unit with a special name is used for solid angle?

    Antwoord

    steradian (sr).

  25. Kaart 25

    Vraag

    Which SI unit with a special name is used for power or radiant flux?

    Antwoord

    watt (W).

  26. Kaart 26

    Vraag

    Which SI unit with a special name is used for electric conductance?

    Antwoord

    siemens (S).

  27. Kaart 27

    Vraag

    Which SI unit with a special name is used for luminous flux?

    Antwoord

    lumen (lm).

  28. Kaart 28

    Vraag

    Which SI unit with a special name is used for catalytic activity?

    Antwoord

    katal (kat).

  29. Kaart 29

    Vraag

    Which SI unit with a special name is used for pressure or stress?

    Antwoord

    pascal (Pa).

  30. Kaart 30

    Vraag

    Which SI unit with a special name is used for capacitance?

    Antwoord

    farad (F).

  31. Kaart 31

    Vraag

    Which SI unit with a special name is used for inductance?

    Antwoord

    henry (H).

  32. Kaart 32

    Vraag

    Which SI unit with a special name is used for absorbed dose or kerma?

    Antwoord

    gray (Gy).

  33. Kaart 33

    Vraag

    Which SI unit with a special name is used for frequency?

    Antwoord

    hertz (Hz).

  34. Kaart 34

    Vraag

    Which SI unit with a special name is used for electric charge?

    Antwoord

    coulomb (C).

  35. Kaart 35

    Vraag

    Which SI unit with a special name is used for magnetic flux?

    Antwoord

    weber (Wb).

  36. Kaart 36

    Vraag

    Which SI unit with a special name is used for illuminance?

    Antwoord

    lux (lx).

  37. Kaart 37

    Vraag

    What quantity uses the radian (rad)?

    Antwoord

    Plane angle.

  38. Kaart 38

    Vraag

    What quantity uses the joule (J)?

    Antwoord

    Energy, work, and amount of heat.

  39. Kaart 39

    Vraag

    What quantity uses the ohm (Ω)?

    Antwoord

    Electric resistance.

  40. Kaart 40

    Vraag

    What quantity uses the degree Celsius (°C)?

    Antwoord

    Celsius temperature.

  41. Kaart 41

    Vraag

    What quantity uses the sievert (Sv)?

    Antwoord

    Dose equivalent.

  42. Kaart 42

    Vraag

    What quantity uses the newton (N)?

    Antwoord

    Force.

  43. Kaart 43

    Vraag

    What quantity uses the volt (V)?

    Antwoord

    Electric potential difference.

  44. Kaart 44

    Vraag

    What quantity uses the tesla (T)?

    Antwoord

    Magnetic flux density.

  45. Kaart 45

    Vraag

    What quantity uses the becquerel (Bq)?

    Antwoord

    Activity referred to a radionuclide.

  46. Kaart 46

    Vraag

    What quantity uses the steradian (sr)?

    Antwoord

    Solid angle.

  47. Kaart 47

    Vraag

    What quantity uses the watt (W)?

    Antwoord

    Power and radiant flux.

  48. Kaart 48

    Vraag

    What quantity uses the siemens (S)?

    Antwoord

    Electric conductance.

  49. Kaart 49

    Vraag

    What quantity uses the lumen (lm)?

    Antwoord

    Luminous flux.

  50. Kaart 50

    Vraag

    What quantity uses the katal (kat)?

    Antwoord

    Catalytic activity.

  51. Kaart 51

    Vraag

    What quantity uses the pascal (Pa)?

    Antwoord

    Pressure and stress.

  52. Kaart 52

    Vraag

    What quantity uses the farad (F)?

    Antwoord

    Capacitance.

  53. Kaart 53

    Vraag

    What quantity uses the henry (H)?

    Antwoord

    Inductance.

  54. Kaart 54

    Vraag

    What quantity uses the gray (Gy)?

    Antwoord

    Absorbed dose and kerma.

  55. Kaart 55

    Vraag

    What quantity uses the hertz (Hz)?

    Antwoord

    Frequency.

    Abstract glowing measurement forms connected in a geometric system on a dark blue background.

    110 kaarten

    SI Units Flashcards: 7 Base Units & 22 Named Derived Units

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  56. Kaart 56

    Vraag

    What quantity uses the coulomb (C)?

    Antwoord

    Electric charge.

  57. Kaart 57

    Vraag

    What quantity uses the weber (Wb)?

    Antwoord

    Magnetic flux.

  58. Kaart 58

    Vraag

    What quantity uses the lux (lx)?

    Antwoord

    Illuminance.

  59. Kaart 59

    Vraag

    Express the radian (rad) in coherent SI base units.

    Antwoord

    1. The symbol rad keeps the plane-angle context explicit.

  60. Kaart 60

    Vraag

    Express the joule (J) in coherent SI base units.

    Antwoord

    kg·m²·s⁻².

  61. Kaart 61

    Vraag

    Express the ohm (Ω) in coherent SI base units.

    Antwoord

    kg·m²·s⁻³·A⁻².

  62. Kaart 62

    Vraag

    Express the degree Celsius (°C) in coherent SI base units.

    Antwoord

    K. A degree Celsius and a kelvin have the same size; their zero points differ.

  63. Kaart 63

    Vraag

    Express the sievert (Sv) in coherent SI base units.

    Antwoord

    m²·s⁻².

  64. Kaart 64

    Vraag

    Express the newton (N) in coherent SI base units.

    Antwoord

    kg·m·s⁻².

  65. Kaart 65

    Vraag

    Express the volt (V) in coherent SI base units.

    Antwoord

    kg·m²·s⁻³·A⁻¹.

  66. Kaart 66

    Vraag

    Express the tesla (T) in coherent SI base units.

    Antwoord

    kg·s⁻²·A⁻¹.

  67. Kaart 67

    Vraag

    Express the becquerel (Bq) in coherent SI base units.

    Antwoord

    s⁻¹. Use Bq for stochastic nuclear transformations, not periodic phenomena.

  68. Kaart 68

    Vraag

    Express the steradian (sr) in coherent SI base units.

    Antwoord

    1. The symbol sr keeps the solid-angle context explicit.

  69. Kaart 69

    Vraag

    Express the watt (W) in coherent SI base units.

    Antwoord

    kg·m²·s⁻³.

  70. Kaart 70

    Vraag

    Express the siemens (S) in coherent SI base units.

    Antwoord

    kg⁻¹·m⁻²·s³·A².

  71. Kaart 71

    Vraag

    Express the lumen (lm) in coherent SI base units.

    Antwoord

    cd·sr. Since sr has unit one, this is dimensionally cd; sr keeps the solid-angle context explicit.

  72. Kaart 72

    Vraag

    Express the katal (kat) in coherent SI base units.

    Antwoord

    mol·s⁻¹.

  73. Kaart 73

    Vraag

    Express the pascal (Pa) in coherent SI base units.

    Antwoord

    kg·m⁻¹·s⁻².

  74. Kaart 74

    Vraag

    Express the farad (F) in coherent SI base units.

    Antwoord

    kg⁻¹·m⁻²·s⁴·A².

  75. Kaart 75

    Vraag

    Express the henry (H) in coherent SI base units.

    Antwoord

    kg·m²·s⁻²·A⁻².

  76. Kaart 76

    Vraag

    Express the gray (Gy) in coherent SI base units.

    Antwoord

    m²·s⁻².

  77. Kaart 77

    Vraag

    Express the hertz (Hz) in coherent SI base units.

    Antwoord

    s⁻¹. Use Hz for periodic phenomena.

  78. Kaart 78

    Vraag

    Express the coulomb (C) in coherent SI base units.

    Antwoord

    A·s.

  79. Kaart 79

    Vraag

    Express the weber (Wb) in coherent SI base units.

    Antwoord

    kg·m²·s⁻²·A⁻¹.

  80. Kaart 80

    Vraag

    Express the lux (lx) in coherent SI base units.

    Antwoord

    cd·sr·m⁻². Since sr has unit one, this is dimensionally cd·m⁻²; sr keeps the solid-angle context explicit.

  81. Kaart 81

    Vraag

    For plane angle, which named SI unit has the coherent base-unit expression 1?

    Antwoord

    radian (rad).

  82. Kaart 82

    Vraag

    For energy, work, or amount of heat, which named SI unit has the coherent base-unit expression kg·m²·s⁻²?

    Antwoord

    joule (J).

  83. Kaart 83

    Vraag

    For electric resistance, which named SI unit has the coherent base-unit expression kg·m²·s⁻³·A⁻²?

    Antwoord

    ohm (Ω).

  84. Kaart 84

    Vraag

    For Celsius temperature, which named SI unit has the coherent base-unit expression K?

    Antwoord

    degree Celsius (°C).

  85. Kaart 85

    Vraag

    For dose equivalent, which named SI unit has the coherent base-unit expression m²·s⁻²?

    Antwoord

    sievert (Sv).

  86. Kaart 86

    Vraag

    For force, which named SI unit has the coherent base-unit expression kg·m·s⁻²?

    Antwoord

    newton (N).

  87. Kaart 87

    Vraag

    For electric potential difference, which named SI unit has the coherent base-unit expression kg·m²·s⁻³·A⁻¹?

    Antwoord

    volt (V).

  88. Kaart 88

    Vraag

    For magnetic flux density, which named SI unit has the coherent base-unit expression kg·s⁻²·A⁻¹?

    Antwoord

    tesla (T).

  89. Kaart 89

    Vraag

    For activity referred to a radionuclide, which named SI unit has the coherent base-unit expression s⁻¹?

    Antwoord

    becquerel (Bq).

  90. Kaart 90

    Vraag

    For solid angle, which named SI unit has the coherent base-unit expression 1?

    Antwoord

    steradian (sr).

  91. Kaart 91

    Vraag

    For power or radiant flux, which named SI unit has the coherent base-unit expression kg·m²·s⁻³?

    Antwoord

    watt (W).

  92. Kaart 92

    Vraag

    For electric conductance, which named SI unit has the coherent base-unit expression kg⁻¹·m⁻²·s³·A²?

    Antwoord

    siemens (S).

  93. Kaart 93

    Vraag

    For luminous flux, which named SI unit has the coherent base-unit expression cd·sr?

    Antwoord

    lumen (lm).

  94. Kaart 94

    Vraag

    For catalytic activity, which named SI unit has the coherent base-unit expression mol·s⁻¹?

    Antwoord

    katal (kat).

  95. Kaart 95

    Vraag

    For pressure or stress, which named SI unit has the coherent base-unit expression kg·m⁻¹·s⁻²?

    Antwoord

    pascal (Pa).

  96. Kaart 96

    Vraag

    For capacitance, which named SI unit has the coherent base-unit expression kg⁻¹·m⁻²·s⁴·A²?

    Antwoord

    farad (F).

  97. Kaart 97

    Vraag

    For inductance, which named SI unit has the coherent base-unit expression kg·m²·s⁻²·A⁻²?

    Antwoord

    henry (H).

  98. Kaart 98

    Vraag

    For absorbed dose or kerma, which named SI unit has the coherent base-unit expression m²·s⁻²?

    Antwoord

    gray (Gy).

  99. Kaart 99

    Vraag

    For frequency, which named SI unit has the coherent base-unit expression s⁻¹?

    Antwoord

    hertz (Hz).

  100. Kaart 100

    Vraag

    For electric charge, which named SI unit has the coherent base-unit expression A·s?

    Antwoord

    coulomb (C).

  101. Kaart 101

    Vraag

    For magnetic flux, which named SI unit has the coherent base-unit expression kg·m²·s⁻²·A⁻¹?

    Antwoord

    weber (Wb).

  102. Kaart 102

    Vraag

    For illuminance, which named SI unit has the coherent base-unit expression cd·sr·m⁻²?

    Antwoord

    lux (lx).

  103. Kaart 103

    Vraag

    How are SI unit names capitalized in English?

    Antwoord

    They normally start with a lowercase letter, even when named after a person. Within this deck, the proper-name modifier in degree Celsius keeps its capital C.

  104. Kaart 104

    Vraag

    What determines capitalization in an SI unit symbol?

    Antwoord

    Symbols derived from proper names start with a capital letter; the others are lowercase. Case is mandatory and meaningful.

  105. Kaart 105

    Vraag

    How do SI unit symbols behave in plurals and at sentence endings?

    Antwoord

    They never take a plural ending, and they take no period unless the symbol ends a sentence. Unit symbols are mathematical symbols, not abbreviations.

  106. Kaart 106

    Vraag

    How should a number and an SI unit symbol be spaced?

    Antwoord

    Put a space between them: 25 m and 20 °C. In °C, the degree sign and C stay together.

  107. Kaart 107

    Vraag

    Both hertz and becquerel reduce to s⁻¹. When is each used?

    Antwoord

    Use hertz (Hz) for periodic phenomena and becquerel (Bq) for activity referred to a radionuclide. The shared expression doesn't make the quantities interchangeable.

  108. Kaart 108

    Vraag

    Both gray and sievert reduce to m²·s⁻². What distinguishes them?

    Antwoord

    Gray (Gy) is used for absorbed dose or kerma; sievert (Sv) is used for dose equivalent. The quantity context determines the special name.

  109. Kaart 109

    Vraag

    Radian and steradian both have coherent unit expression 1. What distinguishes them?

    Antwoord

    Radian (rad) is used for plane angle; steradian (sr) is used for solid angle. Their symbols preserve the quantity context.

  110. Kaart 110

    Vraag

    For temperature intervals, how do kelvin and degrees Celsius compare?

    Antwoord

    A change of 1 K equals a change of 1 °C. Their zero points differ, so absolute temperatures aren't numerically equal.

Abstract glowing measurement forms connected in a geometric system on a dark blue background.

110 kaarten

SI Units Flashcards: 7 Base Units & 22 Named Derived Units

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Nibomo opent zodat je meteen kunt beginnen met leren.