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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.

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Om den här kortleken

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.

Kort i den här kortleken

  1. Kort 1

    Fråga

    What is the SI base unit for time?

    Svar

    second (s).

  2. Kort 2

    Fråga

    What is the SI base unit for length?

    Svar

    metre (m).

  3. Kort 3

    Fråga

    What is the SI base unit for mass?

    Svar

    kilogram (kg).

  4. Kort 4

    Fråga

    What is the SI base unit for electric current?

    Svar

    ampere (A).

  5. Kort 5

    Fråga

    What is the SI base unit for thermodynamic temperature?

    Svar

    kelvin (K).

  6. Kort 6

    Fråga

    What is the SI base unit for amount of substance?

    Svar

    mole (mol).

  7. Kort 7

    Fråga

    What is the SI base unit for luminous intensity?

    Svar

    candela (cd).

  8. Kort 8

    Fråga

    Which SI base quantity uses the second (s)?

    Svar

    Time.

  9. Kort 9

    Fråga

    Which SI base quantity uses the metre (m)?

    Svar

    Length.

  10. Kort 10

    Fråga

    Which SI base quantity uses the kilogram (kg)?

    Svar

    Mass.

  11. Kort 11

    Fråga

    Which SI base quantity uses the ampere (A)?

    Svar

    Electric current.

  12. Kort 12

    Fråga

    Which SI base quantity uses the kelvin (K)?

    Svar

    Thermodynamic temperature.

  13. Kort 13

    Fråga

    Which SI base quantity uses the mole (mol)?

    Svar

    Amount of substance.

  14. Kort 14

    Fråga

    Which SI base quantity uses the candela (cd)?

    Svar

    Luminous intensity.

  15. Kort 15

    Fråga

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

    Svar

    radian (rad).

  16. Kort 16

    Fråga

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

    Svar

    joule (J).

  17. Kort 17

    Fråga

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

    Svar

    ohm (Ω).

  18. Kort 18

    Fråga

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

    Svar

    degree Celsius (°C).

  19. Kort 19

    Fråga

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

    Svar

    sievert (Sv).

  20. Kort 20

    Fråga

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

    Svar

    newton (N).

  21. Kort 21

    Fråga

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

    Svar

    volt (V).

  22. Kort 22

    Fråga

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

    Svar

    tesla (T).

  23. Kort 23

    Fråga

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

    Svar

    becquerel (Bq).

  24. Kort 24

    Fråga

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

    Svar

    steradian (sr).

  25. Kort 25

    Fråga

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

    Svar

    watt (W).

  26. Kort 26

    Fråga

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

    Svar

    siemens (S).

  27. Kort 27

    Fråga

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

    Svar

    lumen (lm).

  28. Kort 28

    Fråga

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

    Svar

    katal (kat).

  29. Kort 29

    Fråga

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

    Svar

    pascal (Pa).

  30. Kort 30

    Fråga

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

    Svar

    farad (F).

  31. Kort 31

    Fråga

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

    Svar

    henry (H).

  32. Kort 32

    Fråga

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

    Svar

    gray (Gy).

  33. Kort 33

    Fråga

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

    Svar

    hertz (Hz).

  34. Kort 34

    Fråga

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

    Svar

    coulomb (C).

  35. Kort 35

    Fråga

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

    Svar

    weber (Wb).

  36. Kort 36

    Fråga

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

    Svar

    lux (lx).

  37. Kort 37

    Fråga

    What quantity uses the radian (rad)?

    Svar

    Plane angle.

  38. Kort 38

    Fråga

    What quantity uses the joule (J)?

    Svar

    Energy, work, and amount of heat.

  39. Kort 39

    Fråga

    What quantity uses the ohm (Ω)?

    Svar

    Electric resistance.

  40. Kort 40

    Fråga

    What quantity uses the degree Celsius (°C)?

    Svar

    Celsius temperature.

  41. Kort 41

    Fråga

    What quantity uses the sievert (Sv)?

    Svar

    Dose equivalent.

  42. Kort 42

    Fråga

    What quantity uses the newton (N)?

    Svar

    Force.

  43. Kort 43

    Fråga

    What quantity uses the volt (V)?

    Svar

    Electric potential difference.

  44. Kort 44

    Fråga

    What quantity uses the tesla (T)?

    Svar

    Magnetic flux density.

  45. Kort 45

    Fråga

    What quantity uses the becquerel (Bq)?

    Svar

    Activity referred to a radionuclide.

  46. Kort 46

    Fråga

    What quantity uses the steradian (sr)?

    Svar

    Solid angle.

  47. Kort 47

    Fråga

    What quantity uses the watt (W)?

    Svar

    Power and radiant flux.

  48. Kort 48

    Fråga

    What quantity uses the siemens (S)?

    Svar

    Electric conductance.

  49. Kort 49

    Fråga

    What quantity uses the lumen (lm)?

    Svar

    Luminous flux.

  50. Kort 50

    Fråga

    What quantity uses the katal (kat)?

    Svar

    Catalytic activity.

  51. Kort 51

    Fråga

    What quantity uses the pascal (Pa)?

    Svar

    Pressure and stress.

  52. Kort 52

    Fråga

    What quantity uses the farad (F)?

    Svar

    Capacitance.

  53. Kort 53

    Fråga

    What quantity uses the henry (H)?

    Svar

    Inductance.

  54. Kort 54

    Fråga

    What quantity uses the gray (Gy)?

    Svar

    Absorbed dose and kerma.

  55. Kort 55

    Fråga

    What quantity uses the hertz (Hz)?

    Svar

    Frequency.

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

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  56. Kort 56

    Fråga

    What quantity uses the coulomb (C)?

    Svar

    Electric charge.

  57. Kort 57

    Fråga

    What quantity uses the weber (Wb)?

    Svar

    Magnetic flux.

  58. Kort 58

    Fråga

    What quantity uses the lux (lx)?

    Svar

    Illuminance.

  59. Kort 59

    Fråga

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

    Svar

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

  60. Kort 60

    Fråga

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

    Svar

    kg·m²·s⁻².

  61. Kort 61

    Fråga

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

    Svar

    kg·m²·s⁻³·A⁻².

  62. Kort 62

    Fråga

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

    Svar

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

  63. Kort 63

    Fråga

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

    Svar

    m²·s⁻².

  64. Kort 64

    Fråga

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

    Svar

    kg·m·s⁻².

  65. Kort 65

    Fråga

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

    Svar

    kg·m²·s⁻³·A⁻¹.

  66. Kort 66

    Fråga

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

    Svar

    kg·s⁻²·A⁻¹.

  67. Kort 67

    Fråga

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

    Svar

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

  68. Kort 68

    Fråga

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

    Svar

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

  69. Kort 69

    Fråga

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

    Svar

    kg·m²·s⁻³.

  70. Kort 70

    Fråga

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

    Svar

    kg⁻¹·m⁻²·s³·A².

  71. Kort 71

    Fråga

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

    Svar

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

  72. Kort 72

    Fråga

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

    Svar

    mol·s⁻¹.

  73. Kort 73

    Fråga

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

    Svar

    kg·m⁻¹·s⁻².

  74. Kort 74

    Fråga

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

    Svar

    kg⁻¹·m⁻²·s⁴·A².

  75. Kort 75

    Fråga

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

    Svar

    kg·m²·s⁻²·A⁻².

  76. Kort 76

    Fråga

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

    Svar

    m²·s⁻².

  77. Kort 77

    Fråga

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

    Svar

    s⁻¹. Use Hz for periodic phenomena.

  78. Kort 78

    Fråga

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

    Svar

    A·s.

  79. Kort 79

    Fråga

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

    Svar

    kg·m²·s⁻²·A⁻¹.

  80. Kort 80

    Fråga

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

    Svar

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

  81. Kort 81

    Fråga

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

    Svar

    radian (rad).

  82. Kort 82

    Fråga

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

    Svar

    joule (J).

  83. Kort 83

    Fråga

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

    Svar

    ohm (Ω).

  84. Kort 84

    Fråga

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

    Svar

    degree Celsius (°C).

  85. Kort 85

    Fråga

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

    Svar

    sievert (Sv).

  86. Kort 86

    Fråga

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

    Svar

    newton (N).

  87. Kort 87

    Fråga

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

    Svar

    volt (V).

  88. Kort 88

    Fråga

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

    Svar

    tesla (T).

  89. Kort 89

    Fråga

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

    Svar

    becquerel (Bq).

  90. Kort 90

    Fråga

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

    Svar

    steradian (sr).

  91. Kort 91

    Fråga

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

    Svar

    watt (W).

  92. Kort 92

    Fråga

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

    Svar

    siemens (S).

  93. Kort 93

    Fråga

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

    Svar

    lumen (lm).

  94. Kort 94

    Fråga

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

    Svar

    katal (kat).

  95. Kort 95

    Fråga

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

    Svar

    pascal (Pa).

  96. Kort 96

    Fråga

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

    Svar

    farad (F).

  97. Kort 97

    Fråga

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

    Svar

    henry (H).

  98. Kort 98

    Fråga

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

    Svar

    gray (Gy).

  99. Kort 99

    Fråga

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

    Svar

    hertz (Hz).

  100. Kort 100

    Fråga

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

    Svar

    coulomb (C).

  101. Kort 101

    Fråga

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

    Svar

    weber (Wb).

  102. Kort 102

    Fråga

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

    Svar

    lux (lx).

  103. Kort 103

    Fråga

    How are SI unit names capitalized in English?

    Svar

    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. Kort 104

    Fråga

    What determines capitalization in an SI unit symbol?

    Svar

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

  105. Kort 105

    Fråga

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

    Svar

    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. Kort 106

    Fråga

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

    Svar

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

  107. Kort 107

    Fråga

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

    Svar

    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. Kort 108

    Fråga

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

    Svar

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

  109. Kort 109

    Fråga

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

    Svar

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

  110. Kort 110

    Fråga

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

    Svar

    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 kort

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

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