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.
Om denne bunke
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.
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Named unit ↔ coherent base-unit expression: expand all 22 special names, then reverse the mapping with the quantity supplied whenever an expression is shared.
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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 denne bunke
Kort 1
Spørgsmål
What is the SI base unit for time?
Svar
second (s).
Kort 2
Spørgsmål
What is the SI base unit for length?
Svar
metre (m).
Kort 3
Spørgsmål
What is the SI base unit for mass?
Svar
kilogram (kg).
Kort 4
Spørgsmål
What is the SI base unit for electric current?
Svar
ampere (A).
Kort 5
Spørgsmål
What is the SI base unit for thermodynamic temperature?
Svar
kelvin (K).
Kort 6
Spørgsmål
What is the SI base unit for amount of substance?
Svar
mole (mol).
Kort 7
Spørgsmål
What is the SI base unit for luminous intensity?
Svar
candela (cd).
Kort 8
Spørgsmål
Which SI base quantity uses the second (s)?
Svar
Time.
Kort 9
Spørgsmål
Which SI base quantity uses the metre (m)?
Svar
Length.
Kort 10
Spørgsmål
Which SI base quantity uses the kilogram (kg)?
Svar
Mass.
Kort 11
Spørgsmål
Which SI base quantity uses the ampere (A)?
Svar
Electric current.
Kort 12
Spørgsmål
Which SI base quantity uses the kelvin (K)?
Svar
Thermodynamic temperature.
Kort 13
Spørgsmål
Which SI base quantity uses the mole (mol)?
Svar
Amount of substance.
Kort 14
Spørgsmål
Which SI base quantity uses the candela (cd)?
Svar
Luminous intensity.
Kort 15
Spørgsmål
Which SI unit with a special name is used for plane angle?
Svar
radian (rad).
Kort 16
Spørgsmål
Which SI unit with a special name is used for energy, work, or amount of heat?
Svar
joule (J).
Kort 17
Spørgsmål
Which SI unit with a special name is used for electric resistance?
Svar
ohm (Ω).
Kort 18
Spørgsmål
Which SI unit with a special name is used for Celsius temperature?
Svar
degree Celsius (°C).
Kort 19
Spørgsmål
Which SI unit with a special name is used for dose equivalent?
Svar
sievert (Sv).
Kort 20
Spørgsmål
Which SI unit with a special name is used for force?
Svar
newton (N).
Kort 21
Spørgsmål
Which SI unit with a special name is used for electric potential difference?
Svar
volt (V).
Kort 22
Spørgsmål
Which SI unit with a special name is used for magnetic flux density?
Svar
tesla (T).
Kort 23
Spørgsmål
Which SI unit with a special name is used for activity referred to a radionuclide?
Svar
becquerel (Bq).
Kort 24
Spørgsmål
Which SI unit with a special name is used for solid angle?
Svar
steradian (sr).
Kort 25
Spørgsmål
Which SI unit with a special name is used for power or radiant flux?
Svar
watt (W).
Kort 26
Spørgsmål
Which SI unit with a special name is used for electric conductance?
Svar
siemens (S).
Kort 27
Spørgsmål
Which SI unit with a special name is used for luminous flux?
Svar
lumen (lm).
Kort 28
Spørgsmål
Which SI unit with a special name is used for catalytic activity?
Svar
katal (kat).
Kort 29
Spørgsmål
Which SI unit with a special name is used for pressure or stress?
Svar
pascal (Pa).
Kort 30
Spørgsmål
Which SI unit with a special name is used for capacitance?
Svar
farad (F).
Kort 31
Spørgsmål
Which SI unit with a special name is used for inductance?
Svar
henry (H).
Kort 32
Spørgsmål
Which SI unit with a special name is used for absorbed dose or kerma?
Svar
gray (Gy).
Kort 33
Spørgsmål
Which SI unit with a special name is used for frequency?
Svar
hertz (Hz).
Kort 34
Spørgsmål
Which SI unit with a special name is used for electric charge?
Svar
coulomb (C).
Kort 35
Spørgsmål
Which SI unit with a special name is used for magnetic flux?
Svar
weber (Wb).
Kort 36
Spørgsmål
Which SI unit with a special name is used for illuminance?
Svar
lux (lx).
Kort 37
Spørgsmål
What quantity uses the radian (rad)?
Svar
Plane angle.
Kort 38
Spørgsmål
What quantity uses the joule (J)?
Svar
Energy, work, and amount of heat.
Kort 39
Spørgsmål
What quantity uses the ohm (Ω)?
Svar
Electric resistance.
Kort 40
Spørgsmål
What quantity uses the degree Celsius (°C)?
Svar
Celsius temperature.
Kort 41
Spørgsmål
What quantity uses the sievert (Sv)?
Svar
Dose equivalent.
Kort 42
Spørgsmål
What quantity uses the newton (N)?
Svar
Force.
Kort 43
Spørgsmål
What quantity uses the volt (V)?
Svar
Electric potential difference.
Kort 44
Spørgsmål
What quantity uses the tesla (T)?
Svar
Magnetic flux density.
Kort 45
Spørgsmål
What quantity uses the becquerel (Bq)?
Svar
Activity referred to a radionuclide.
Kort 46
Spørgsmål
What quantity uses the steradian (sr)?
Svar
Solid angle.
Kort 47
Spørgsmål
What quantity uses the watt (W)?
Svar
Power and radiant flux.
Kort 48
Spørgsmål
What quantity uses the siemens (S)?
Svar
Electric conductance.
Kort 49
Spørgsmål
What quantity uses the lumen (lm)?
Svar
Luminous flux.
Kort 50
Spørgsmål
What quantity uses the katal (kat)?
Svar
Catalytic activity.
Kort 51
Spørgsmål
What quantity uses the pascal (Pa)?
Svar
Pressure and stress.
Kort 52
Spørgsmål
What quantity uses the farad (F)?
Svar
Capacitance.
Kort 53
Spørgsmål
What quantity uses the henry (H)?
Svar
Inductance.
Kort 54
Spørgsmål
What quantity uses the gray (Gy)?
Svar
Absorbed dose and kerma.
Kort 55
Spørgsmål
What quantity uses the hertz (Hz)?
Svar
Frequency.
110 kort
SI Units Flashcards: 7 Base Units & 22 Named Derived Units
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Kort 56
Spørgsmål
What quantity uses the coulomb (C)?
Svar
Electric charge.
Kort 57
Spørgsmål
What quantity uses the weber (Wb)?
Svar
Magnetic flux.
Kort 58
Spørgsmål
What quantity uses the lux (lx)?
Svar
Illuminance.
Kort 59
Spørgsmål
Express the radian (rad) in coherent SI base units.
Svar
1. The symbol rad keeps the plane-angle context explicit.
Kort 60
Spørgsmål
Express the joule (J) in coherent SI base units.
Svar
kg·m²·s⁻².
Kort 61
Spørgsmål
Express the ohm (Ω) in coherent SI base units.
Svar
kg·m²·s⁻³·A⁻².
Kort 62
Spørgsmål
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.
Kort 63
Spørgsmål
Express the sievert (Sv) in coherent SI base units.
Svar
m²·s⁻².
Kort 64
Spørgsmål
Express the newton (N) in coherent SI base units.
Svar
kg·m·s⁻².
Kort 65
Spørgsmål
Express the volt (V) in coherent SI base units.
Svar
kg·m²·s⁻³·A⁻¹.
Kort 66
Spørgsmål
Express the tesla (T) in coherent SI base units.
Svar
kg·s⁻²·A⁻¹.
Kort 67
Spørgsmål
Express the becquerel (Bq) in coherent SI base units.
Svar
s⁻¹. Use Bq for stochastic nuclear transformations, not periodic phenomena.
Kort 68
Spørgsmål
Express the steradian (sr) in coherent SI base units.
Svar
1. The symbol sr keeps the solid-angle context explicit.
Kort 69
Spørgsmål
Express the watt (W) in coherent SI base units.
Svar
kg·m²·s⁻³.
Kort 70
Spørgsmål
Express the siemens (S) in coherent SI base units.
Svar
kg⁻¹·m⁻²·s³·A².
Kort 71
Spørgsmål
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.
Kort 72
Spørgsmål
Express the katal (kat) in coherent SI base units.
Svar
mol·s⁻¹.
Kort 73
Spørgsmål
Express the pascal (Pa) in coherent SI base units.
Svar
kg·m⁻¹·s⁻².
Kort 74
Spørgsmål
Express the farad (F) in coherent SI base units.
Svar
kg⁻¹·m⁻²·s⁴·A².
Kort 75
Spørgsmål
Express the henry (H) in coherent SI base units.
Svar
kg·m²·s⁻²·A⁻².
Kort 76
Spørgsmål
Express the gray (Gy) in coherent SI base units.
Svar
m²·s⁻².
Kort 77
Spørgsmål
Express the hertz (Hz) in coherent SI base units.
Svar
s⁻¹. Use Hz for periodic phenomena.
Kort 78
Spørgsmål
Express the coulomb (C) in coherent SI base units.
Svar
A·s.
Kort 79
Spørgsmål
Express the weber (Wb) in coherent SI base units.
Svar
kg·m²·s⁻²·A⁻¹.
Kort 80
Spørgsmål
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.
Kort 81
Spørgsmål
For plane angle, which named SI unit has the coherent base-unit expression 1?
Svar
radian (rad).
Kort 82
Spørgsmål
For energy, work, or amount of heat, which named SI unit has the coherent base-unit expression kg·m²·s⁻²?
Svar
joule (J).
Kort 83
Spørgsmål
For electric resistance, which named SI unit has the coherent base-unit expression kg·m²·s⁻³·A⁻²?
Svar
ohm (Ω).
Kort 84
Spørgsmål
For Celsius temperature, which named SI unit has the coherent base-unit expression K?
Svar
degree Celsius (°C).
Kort 85
Spørgsmål
For dose equivalent, which named SI unit has the coherent base-unit expression m²·s⁻²?
Svar
sievert (Sv).
Kort 86
Spørgsmål
For force, which named SI unit has the coherent base-unit expression kg·m·s⁻²?
Svar
newton (N).
Kort 87
Spørgsmål
For electric potential difference, which named SI unit has the coherent base-unit expression kg·m²·s⁻³·A⁻¹?
Svar
volt (V).
Kort 88
Spørgsmål
For magnetic flux density, which named SI unit has the coherent base-unit expression kg·s⁻²·A⁻¹?
Svar
tesla (T).
Kort 89
Spørgsmål
For activity referred to a radionuclide, which named SI unit has the coherent base-unit expression s⁻¹?
Svar
becquerel (Bq).
Kort 90
Spørgsmål
For solid angle, which named SI unit has the coherent base-unit expression 1?
Svar
steradian (sr).
Kort 91
Spørgsmål
For power or radiant flux, which named SI unit has the coherent base-unit expression kg·m²·s⁻³?
Svar
watt (W).
Kort 92
Spørgsmål
For electric conductance, which named SI unit has the coherent base-unit expression kg⁻¹·m⁻²·s³·A²?
Svar
siemens (S).
Kort 93
Spørgsmål
For luminous flux, which named SI unit has the coherent base-unit expression cd·sr?
Svar
lumen (lm).
Kort 94
Spørgsmål
For catalytic activity, which named SI unit has the coherent base-unit expression mol·s⁻¹?
Svar
katal (kat).
Kort 95
Spørgsmål
For pressure or stress, which named SI unit has the coherent base-unit expression kg·m⁻¹·s⁻²?
Svar
pascal (Pa).
Kort 96
Spørgsmål
For capacitance, which named SI unit has the coherent base-unit expression kg⁻¹·m⁻²·s⁴·A²?
Svar
farad (F).
Kort 97
Spørgsmål
For inductance, which named SI unit has the coherent base-unit expression kg·m²·s⁻²·A⁻²?
Svar
henry (H).
Kort 98
Spørgsmål
For absorbed dose or kerma, which named SI unit has the coherent base-unit expression m²·s⁻²?
Svar
gray (Gy).
Kort 99
Spørgsmål
For frequency, which named SI unit has the coherent base-unit expression s⁻¹?
Svar
hertz (Hz).
Kort 100
Spørgsmål
For electric charge, which named SI unit has the coherent base-unit expression A·s?
Svar
coulomb (C).
Kort 101
Spørgsmål
For magnetic flux, which named SI unit has the coherent base-unit expression kg·m²·s⁻²·A⁻¹?
Svar
weber (Wb).
Kort 102
Spørgsmål
For illuminance, which named SI unit has the coherent base-unit expression cd·sr·m⁻²?
Svar
lux (lx).
Kort 103
Spørgsmål
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.
Kort 104
Spørgsmål
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.
Kort 105
Spørgsmål
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.
Kort 106
Spørgsmål
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.
Kort 107
Spørgsmål
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.
Kort 108
Spørgsmål
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.
Kort 109
Spørgsmål
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.
Kort 110
Spørgsmål
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.
110 kort
SI Units Flashcards: 7 Base Units & 22 Named Derived Units
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