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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.

Autors Open Study Contributor

Par šo kavu

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.

Kartītes šajā kavā

  1. 1. kartīte

    Jautājums

    What is the SI base unit for time?

    Atbilde

    second (s).

  2. 2. kartīte

    Jautājums

    What is the SI base unit for length?

    Atbilde

    metre (m).

  3. 3. kartīte

    Jautājums

    What is the SI base unit for mass?

    Atbilde

    kilogram (kg).

  4. 4. kartīte

    Jautājums

    What is the SI base unit for electric current?

    Atbilde

    ampere (A).

  5. 5. kartīte

    Jautājums

    What is the SI base unit for thermodynamic temperature?

    Atbilde

    kelvin (K).

  6. 6. kartīte

    Jautājums

    What is the SI base unit for amount of substance?

    Atbilde

    mole (mol).

  7. 7. kartīte

    Jautājums

    What is the SI base unit for luminous intensity?

    Atbilde

    candela (cd).

  8. 8. kartīte

    Jautājums

    Which SI base quantity uses the second (s)?

    Atbilde

    Time.

  9. 9. kartīte

    Jautājums

    Which SI base quantity uses the metre (m)?

    Atbilde

    Length.

  10. 10. kartīte

    Jautājums

    Which SI base quantity uses the kilogram (kg)?

    Atbilde

    Mass.

  11. 11. kartīte

    Jautājums

    Which SI base quantity uses the ampere (A)?

    Atbilde

    Electric current.

  12. 12. kartīte

    Jautājums

    Which SI base quantity uses the kelvin (K)?

    Atbilde

    Thermodynamic temperature.

  13. 13. kartīte

    Jautājums

    Which SI base quantity uses the mole (mol)?

    Atbilde

    Amount of substance.

  14. 14. kartīte

    Jautājums

    Which SI base quantity uses the candela (cd)?

    Atbilde

    Luminous intensity.

  15. 15. kartīte

    Jautājums

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

    Atbilde

    radian (rad).

  16. 16. kartīte

    Jautājums

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

    Atbilde

    joule (J).

  17. 17. kartīte

    Jautājums

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

    Atbilde

    ohm (Ω).

  18. 18. kartīte

    Jautājums

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

    Atbilde

    degree Celsius (°C).

  19. 19. kartīte

    Jautājums

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

    Atbilde

    sievert (Sv).

  20. 20. kartīte

    Jautājums

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

    Atbilde

    newton (N).

  21. 21. kartīte

    Jautājums

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

    Atbilde

    volt (V).

  22. 22. kartīte

    Jautājums

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

    Atbilde

    tesla (T).

  23. 23. kartīte

    Jautājums

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

    Atbilde

    becquerel (Bq).

  24. 24. kartīte

    Jautājums

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

    Atbilde

    steradian (sr).

  25. 25. kartīte

    Jautājums

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

    Atbilde

    watt (W).

  26. 26. kartīte

    Jautājums

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

    Atbilde

    siemens (S).

  27. 27. kartīte

    Jautājums

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

    Atbilde

    lumen (lm).

  28. 28. kartīte

    Jautājums

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

    Atbilde

    katal (kat).

  29. 29. kartīte

    Jautājums

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

    Atbilde

    pascal (Pa).

  30. 30. kartīte

    Jautājums

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

    Atbilde

    farad (F).

  31. 31. kartīte

    Jautājums

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

    Atbilde

    henry (H).

  32. 32. kartīte

    Jautājums

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

    Atbilde

    gray (Gy).

  33. 33. kartīte

    Jautājums

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

    Atbilde

    hertz (Hz).

  34. 34. kartīte

    Jautājums

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

    Atbilde

    coulomb (C).

  35. 35. kartīte

    Jautājums

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

    Atbilde

    weber (Wb).

  36. 36. kartīte

    Jautājums

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

    Atbilde

    lux (lx).

  37. 37. kartīte

    Jautājums

    What quantity uses the radian (rad)?

    Atbilde

    Plane angle.

  38. 38. kartīte

    Jautājums

    What quantity uses the joule (J)?

    Atbilde

    Energy, work, and amount of heat.

  39. 39. kartīte

    Jautājums

    What quantity uses the ohm (Ω)?

    Atbilde

    Electric resistance.

  40. 40. kartīte

    Jautājums

    What quantity uses the degree Celsius (°C)?

    Atbilde

    Celsius temperature.

  41. 41. kartīte

    Jautājums

    What quantity uses the sievert (Sv)?

    Atbilde

    Dose equivalent.

  42. 42. kartīte

    Jautājums

    What quantity uses the newton (N)?

    Atbilde

    Force.

  43. 43. kartīte

    Jautājums

    What quantity uses the volt (V)?

    Atbilde

    Electric potential difference.

  44. 44. kartīte

    Jautājums

    What quantity uses the tesla (T)?

    Atbilde

    Magnetic flux density.

  45. 45. kartīte

    Jautājums

    What quantity uses the becquerel (Bq)?

    Atbilde

    Activity referred to a radionuclide.

  46. 46. kartīte

    Jautājums

    What quantity uses the steradian (sr)?

    Atbilde

    Solid angle.

  47. 47. kartīte

    Jautājums

    What quantity uses the watt (W)?

    Atbilde

    Power and radiant flux.

  48. 48. kartīte

    Jautājums

    What quantity uses the siemens (S)?

    Atbilde

    Electric conductance.

  49. 49. kartīte

    Jautājums

    What quantity uses the lumen (lm)?

    Atbilde

    Luminous flux.

  50. 50. kartīte

    Jautājums

    What quantity uses the katal (kat)?

    Atbilde

    Catalytic activity.

  51. 51. kartīte

    Jautājums

    What quantity uses the pascal (Pa)?

    Atbilde

    Pressure and stress.

  52. 52. kartīte

    Jautājums

    What quantity uses the farad (F)?

    Atbilde

    Capacitance.

  53. 53. kartīte

    Jautājums

    What quantity uses the henry (H)?

    Atbilde

    Inductance.

  54. 54. kartīte

    Jautājums

    What quantity uses the gray (Gy)?

    Atbilde

    Absorbed dose and kerma.

  55. 55. kartīte

    Jautājums

    What quantity uses the hertz (Hz)?

    Atbilde

    Frequency.

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

    110 kartīšu

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

    Mācies šo kavu bez maksas

    Atvērsies Nibomo, lai vari sākt mācīties.

  56. 56. kartīte

    Jautājums

    What quantity uses the coulomb (C)?

    Atbilde

    Electric charge.

  57. 57. kartīte

    Jautājums

    What quantity uses the weber (Wb)?

    Atbilde

    Magnetic flux.

  58. 58. kartīte

    Jautājums

    What quantity uses the lux (lx)?

    Atbilde

    Illuminance.

  59. 59. kartīte

    Jautājums

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

    Atbilde

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

  60. 60. kartīte

    Jautājums

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

    Atbilde

    kg·m²·s⁻².

  61. 61. kartīte

    Jautājums

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

    Atbilde

    kg·m²·s⁻³·A⁻².

  62. 62. kartīte

    Jautājums

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

    Atbilde

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

  63. 63. kartīte

    Jautājums

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

    Atbilde

    m²·s⁻².

  64. 64. kartīte

    Jautājums

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

    Atbilde

    kg·m·s⁻².

  65. 65. kartīte

    Jautājums

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

    Atbilde

    kg·m²·s⁻³·A⁻¹.

  66. 66. kartīte

    Jautājums

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

    Atbilde

    kg·s⁻²·A⁻¹.

  67. 67. kartīte

    Jautājums

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

    Atbilde

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

  68. 68. kartīte

    Jautājums

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

    Atbilde

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

  69. 69. kartīte

    Jautājums

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

    Atbilde

    kg·m²·s⁻³.

  70. 70. kartīte

    Jautājums

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

    Atbilde

    kg⁻¹·m⁻²·s³·A².

  71. 71. kartīte

    Jautājums

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

    Atbilde

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

  72. 72. kartīte

    Jautājums

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

    Atbilde

    mol·s⁻¹.

  73. 73. kartīte

    Jautājums

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

    Atbilde

    kg·m⁻¹·s⁻².

  74. 74. kartīte

    Jautājums

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

    Atbilde

    kg⁻¹·m⁻²·s⁴·A².

  75. 75. kartīte

    Jautājums

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

    Atbilde

    kg·m²·s⁻²·A⁻².

  76. 76. kartīte

    Jautājums

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

    Atbilde

    m²·s⁻².

  77. 77. kartīte

    Jautājums

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

    Atbilde

    s⁻¹. Use Hz for periodic phenomena.

  78. 78. kartīte

    Jautājums

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

    Atbilde

    A·s.

  79. 79. kartīte

    Jautājums

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

    Atbilde

    kg·m²·s⁻²·A⁻¹.

  80. 80. kartīte

    Jautājums

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

    Atbilde

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

  81. 81. kartīte

    Jautājums

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

    Atbilde

    radian (rad).

  82. 82. kartīte

    Jautājums

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

    Atbilde

    joule (J).

  83. 83. kartīte

    Jautājums

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

    Atbilde

    ohm (Ω).

  84. 84. kartīte

    Jautājums

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

    Atbilde

    degree Celsius (°C).

  85. 85. kartīte

    Jautājums

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

    Atbilde

    sievert (Sv).

  86. 86. kartīte

    Jautājums

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

    Atbilde

    newton (N).

  87. 87. kartīte

    Jautājums

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

    Atbilde

    volt (V).

  88. 88. kartīte

    Jautājums

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

    Atbilde

    tesla (T).

  89. 89. kartīte

    Jautājums

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

    Atbilde

    becquerel (Bq).

  90. 90. kartīte

    Jautājums

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

    Atbilde

    steradian (sr).

  91. 91. kartīte

    Jautājums

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

    Atbilde

    watt (W).

  92. 92. kartīte

    Jautājums

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

    Atbilde

    siemens (S).

  93. 93. kartīte

    Jautājums

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

    Atbilde

    lumen (lm).

  94. 94. kartīte

    Jautājums

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

    Atbilde

    katal (kat).

  95. 95. kartīte

    Jautājums

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

    Atbilde

    pascal (Pa).

  96. 96. kartīte

    Jautājums

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

    Atbilde

    farad (F).

  97. 97. kartīte

    Jautājums

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

    Atbilde

    henry (H).

  98. 98. kartīte

    Jautājums

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

    Atbilde

    gray (Gy).

  99. 99. kartīte

    Jautājums

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

    Atbilde

    hertz (Hz).

  100. 100. kartīte

    Jautājums

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

    Atbilde

    coulomb (C).

  101. 101. kartīte

    Jautājums

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

    Atbilde

    weber (Wb).

  102. 102. kartīte

    Jautājums

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

    Atbilde

    lux (lx).

  103. 103. kartīte

    Jautājums

    How are SI unit names capitalized in English?

    Atbilde

    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. 104. kartīte

    Jautājums

    What determines capitalization in an SI unit symbol?

    Atbilde

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

  105. 105. kartīte

    Jautājums

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

    Atbilde

    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. 106. kartīte

    Jautājums

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

    Atbilde

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

  107. 107. kartīte

    Jautājums

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

    Atbilde

    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. 108. kartīte

    Jautājums

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

    Atbilde

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

  109. 109. kartīte

    Jautājums

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

    Atbilde

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

  110. 110. kartīte

    Jautājums

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

    Atbilde

    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 kartīšu

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

Mācies šo kavu bez maksas

Atvērsies Nibomo, lai vari sākt mācīties.