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.
Об этой колоде
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
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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.
Карточки в этой колоде
Карточка 1
Вопрос
What is the SI base unit for time?
Ответ
second (s).
Карточка 2
Вопрос
What is the SI base unit for length?
Ответ
metre (m).
Карточка 3
Вопрос
What is the SI base unit for mass?
Ответ
kilogram (kg).
Карточка 4
Вопрос
What is the SI base unit for electric current?
Ответ
ampere (A).
Карточка 5
Вопрос
What is the SI base unit for thermodynamic temperature?
Ответ
kelvin (K).
Карточка 6
Вопрос
What is the SI base unit for amount of substance?
Ответ
mole (mol).
Карточка 7
Вопрос
What is the SI base unit for luminous intensity?
Ответ
candela (cd).
Карточка 8
Вопрос
Which SI base quantity uses the second (s)?
Ответ
Time.
Карточка 9
Вопрос
Which SI base quantity uses the metre (m)?
Ответ
Length.
Карточка 10
Вопрос
Which SI base quantity uses the kilogram (kg)?
Ответ
Mass.
Карточка 11
Вопрос
Which SI base quantity uses the ampere (A)?
Ответ
Electric current.
Карточка 12
Вопрос
Which SI base quantity uses the kelvin (K)?
Ответ
Thermodynamic temperature.
Карточка 13
Вопрос
Which SI base quantity uses the mole (mol)?
Ответ
Amount of substance.
Карточка 14
Вопрос
Which SI base quantity uses the candela (cd)?
Ответ
Luminous intensity.
Карточка 15
Вопрос
Which SI unit with a special name is used for plane angle?
Ответ
radian (rad).
Карточка 16
Вопрос
Which SI unit with a special name is used for energy, work, or amount of heat?
Ответ
joule (J).
Карточка 17
Вопрос
Which SI unit with a special name is used for electric resistance?
Ответ
ohm (Ω).
Карточка 18
Вопрос
Which SI unit with a special name is used for Celsius temperature?
Ответ
degree Celsius (°C).
Карточка 19
Вопрос
Which SI unit with a special name is used for dose equivalent?
Ответ
sievert (Sv).
Карточка 20
Вопрос
Which SI unit with a special name is used for force?
Ответ
newton (N).
Карточка 21
Вопрос
Which SI unit with a special name is used for electric potential difference?
Ответ
volt (V).
Карточка 22
Вопрос
Which SI unit with a special name is used for magnetic flux density?
Ответ
tesla (T).
Карточка 23
Вопрос
Which SI unit with a special name is used for activity referred to a radionuclide?
Ответ
becquerel (Bq).
Карточка 24
Вопрос
Which SI unit with a special name is used for solid angle?
Ответ
steradian (sr).
Карточка 25
Вопрос
Which SI unit with a special name is used for power or radiant flux?
Ответ
watt (W).
Карточка 26
Вопрос
Which SI unit with a special name is used for electric conductance?
Ответ
siemens (S).
Карточка 27
Вопрос
Which SI unit with a special name is used for luminous flux?
Ответ
lumen (lm).
Карточка 28
Вопрос
Which SI unit with a special name is used for catalytic activity?
Ответ
katal (kat).
Карточка 29
Вопрос
Which SI unit with a special name is used for pressure or stress?
Ответ
pascal (Pa).
Карточка 30
Вопрос
Which SI unit with a special name is used for capacitance?
Ответ
farad (F).
Карточка 31
Вопрос
Which SI unit with a special name is used for inductance?
Ответ
henry (H).
Карточка 32
Вопрос
Which SI unit with a special name is used for absorbed dose or kerma?
Ответ
gray (Gy).
Карточка 33
Вопрос
Which SI unit with a special name is used for frequency?
Ответ
hertz (Hz).
Карточка 34
Вопрос
Which SI unit with a special name is used for electric charge?
Ответ
coulomb (C).
Карточка 35
Вопрос
Which SI unit with a special name is used for magnetic flux?
Ответ
weber (Wb).
Карточка 36
Вопрос
Which SI unit with a special name is used for illuminance?
Ответ
lux (lx).
Карточка 37
Вопрос
What quantity uses the radian (rad)?
Ответ
Plane angle.
Карточка 38
Вопрос
What quantity uses the joule (J)?
Ответ
Energy, work, and amount of heat.
Карточка 39
Вопрос
What quantity uses the ohm (Ω)?
Ответ
Electric resistance.
Карточка 40
Вопрос
What quantity uses the degree Celsius (°C)?
Ответ
Celsius temperature.
Карточка 41
Вопрос
What quantity uses the sievert (Sv)?
Ответ
Dose equivalent.
Карточка 42
Вопрос
What quantity uses the newton (N)?
Ответ
Force.
Карточка 43
Вопрос
What quantity uses the volt (V)?
Ответ
Electric potential difference.
Карточка 44
Вопрос
What quantity uses the tesla (T)?
Ответ
Magnetic flux density.
Карточка 45
Вопрос
What quantity uses the becquerel (Bq)?
Ответ
Activity referred to a radionuclide.
Карточка 46
Вопрос
What quantity uses the steradian (sr)?
Ответ
Solid angle.
Карточка 47
Вопрос
What quantity uses the watt (W)?
Ответ
Power and radiant flux.
Карточка 48
Вопрос
What quantity uses the siemens (S)?
Ответ
Electric conductance.
Карточка 49
Вопрос
What quantity uses the lumen (lm)?
Ответ
Luminous flux.
Карточка 50
Вопрос
What quantity uses the katal (kat)?
Ответ
Catalytic activity.
Карточка 51
Вопрос
What quantity uses the pascal (Pa)?
Ответ
Pressure and stress.
Карточка 52
Вопрос
What quantity uses the farad (F)?
Ответ
Capacitance.
Карточка 53
Вопрос
What quantity uses the henry (H)?
Ответ
Inductance.
Карточка 54
Вопрос
What quantity uses the gray (Gy)?
Ответ
Absorbed dose and kerma.
Карточка 55
Вопрос
What quantity uses the hertz (Hz)?
Ответ
Frequency.
110 карточек
SI Units Flashcards: 7 Base Units & 22 Named Derived Units
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Карточка 56
Вопрос
What quantity uses the coulomb (C)?
Ответ
Electric charge.
Карточка 57
Вопрос
What quantity uses the weber (Wb)?
Ответ
Magnetic flux.
Карточка 58
Вопрос
What quantity uses the lux (lx)?
Ответ
Illuminance.
Карточка 59
Вопрос
Express the radian (rad) in coherent SI base units.
Ответ
1. The symbol rad keeps the plane-angle context explicit.
Карточка 60
Вопрос
Express the joule (J) in coherent SI base units.
Ответ
kg·m²·s⁻².
Карточка 61
Вопрос
Express the ohm (Ω) in coherent SI base units.
Ответ
kg·m²·s⁻³·A⁻².
Карточка 62
Вопрос
Express the degree Celsius (°C) in coherent SI base units.
Ответ
K. A degree Celsius and a kelvin have the same size; their zero points differ.
Карточка 63
Вопрос
Express the sievert (Sv) in coherent SI base units.
Ответ
m²·s⁻².
Карточка 64
Вопрос
Express the newton (N) in coherent SI base units.
Ответ
kg·m·s⁻².
Карточка 65
Вопрос
Express the volt (V) in coherent SI base units.
Ответ
kg·m²·s⁻³·A⁻¹.
Карточка 66
Вопрос
Express the tesla (T) in coherent SI base units.
Ответ
kg·s⁻²·A⁻¹.
Карточка 67
Вопрос
Express the becquerel (Bq) in coherent SI base units.
Ответ
s⁻¹. Use Bq for stochastic nuclear transformations, not periodic phenomena.
Карточка 68
Вопрос
Express the steradian (sr) in coherent SI base units.
Ответ
1. The symbol sr keeps the solid-angle context explicit.
Карточка 69
Вопрос
Express the watt (W) in coherent SI base units.
Ответ
kg·m²·s⁻³.
Карточка 70
Вопрос
Express the siemens (S) in coherent SI base units.
Ответ
kg⁻¹·m⁻²·s³·A².
Карточка 71
Вопрос
Express the lumen (lm) in coherent SI base units.
Ответ
cd·sr. Since sr has unit one, this is dimensionally cd; sr keeps the solid-angle context explicit.
Карточка 72
Вопрос
Express the katal (kat) in coherent SI base units.
Ответ
mol·s⁻¹.
Карточка 73
Вопрос
Express the pascal (Pa) in coherent SI base units.
Ответ
kg·m⁻¹·s⁻².
Карточка 74
Вопрос
Express the farad (F) in coherent SI base units.
Ответ
kg⁻¹·m⁻²·s⁴·A².
Карточка 75
Вопрос
Express the henry (H) in coherent SI base units.
Ответ
kg·m²·s⁻²·A⁻².
Карточка 76
Вопрос
Express the gray (Gy) in coherent SI base units.
Ответ
m²·s⁻².
Карточка 77
Вопрос
Express the hertz (Hz) in coherent SI base units.
Ответ
s⁻¹. Use Hz for periodic phenomena.
Карточка 78
Вопрос
Express the coulomb (C) in coherent SI base units.
Ответ
A·s.
Карточка 79
Вопрос
Express the weber (Wb) in coherent SI base units.
Ответ
kg·m²·s⁻²·A⁻¹.
Карточка 80
Вопрос
Express the lux (lx) in coherent SI base units.
Ответ
cd·sr·m⁻². Since sr has unit one, this is dimensionally cd·m⁻²; sr keeps the solid-angle context explicit.
Карточка 81
Вопрос
For plane angle, which named SI unit has the coherent base-unit expression 1?
Ответ
radian (rad).
Карточка 82
Вопрос
For energy, work, or amount of heat, which named SI unit has the coherent base-unit expression kg·m²·s⁻²?
Ответ
joule (J).
Карточка 83
Вопрос
For electric resistance, which named SI unit has the coherent base-unit expression kg·m²·s⁻³·A⁻²?
Ответ
ohm (Ω).
Карточка 84
Вопрос
For Celsius temperature, which named SI unit has the coherent base-unit expression K?
Ответ
degree Celsius (°C).
Карточка 85
Вопрос
For dose equivalent, which named SI unit has the coherent base-unit expression m²·s⁻²?
Ответ
sievert (Sv).
Карточка 86
Вопрос
For force, which named SI unit has the coherent base-unit expression kg·m·s⁻²?
Ответ
newton (N).
Карточка 87
Вопрос
For electric potential difference, which named SI unit has the coherent base-unit expression kg·m²·s⁻³·A⁻¹?
Ответ
volt (V).
Карточка 88
Вопрос
For magnetic flux density, which named SI unit has the coherent base-unit expression kg·s⁻²·A⁻¹?
Ответ
tesla (T).
Карточка 89
Вопрос
For activity referred to a radionuclide, which named SI unit has the coherent base-unit expression s⁻¹?
Ответ
becquerel (Bq).
Карточка 90
Вопрос
For solid angle, which named SI unit has the coherent base-unit expression 1?
Ответ
steradian (sr).
Карточка 91
Вопрос
For power or radiant flux, which named SI unit has the coherent base-unit expression kg·m²·s⁻³?
Ответ
watt (W).
Карточка 92
Вопрос
For electric conductance, which named SI unit has the coherent base-unit expression kg⁻¹·m⁻²·s³·A²?
Ответ
siemens (S).
Карточка 93
Вопрос
For luminous flux, which named SI unit has the coherent base-unit expression cd·sr?
Ответ
lumen (lm).
Карточка 94
Вопрос
For catalytic activity, which named SI unit has the coherent base-unit expression mol·s⁻¹?
Ответ
katal (kat).
Карточка 95
Вопрос
For pressure or stress, which named SI unit has the coherent base-unit expression kg·m⁻¹·s⁻²?
Ответ
pascal (Pa).
Карточка 96
Вопрос
For capacitance, which named SI unit has the coherent base-unit expression kg⁻¹·m⁻²·s⁴·A²?
Ответ
farad (F).
Карточка 97
Вопрос
For inductance, which named SI unit has the coherent base-unit expression kg·m²·s⁻²·A⁻²?
Ответ
henry (H).
Карточка 98
Вопрос
For absorbed dose or kerma, which named SI unit has the coherent base-unit expression m²·s⁻²?
Ответ
gray (Gy).
Карточка 99
Вопрос
For frequency, which named SI unit has the coherent base-unit expression s⁻¹?
Ответ
hertz (Hz).
Карточка 100
Вопрос
For electric charge, which named SI unit has the coherent base-unit expression A·s?
Ответ
coulomb (C).
Карточка 101
Вопрос
For magnetic flux, which named SI unit has the coherent base-unit expression kg·m²·s⁻²·A⁻¹?
Ответ
weber (Wb).
Карточка 102
Вопрос
For illuminance, which named SI unit has the coherent base-unit expression cd·sr·m⁻²?
Ответ
lux (lx).
Карточка 103
Вопрос
How are SI unit names capitalized in English?
Ответ
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.
Карточка 104
Вопрос
What determines capitalization in an SI unit symbol?
Ответ
Symbols derived from proper names start with a capital letter; the others are lowercase. Case is mandatory and meaningful.
Карточка 105
Вопрос
How do SI unit symbols behave in plurals and at sentence endings?
Ответ
They never take a plural ending, and they take no period unless the symbol ends a sentence. Unit symbols are mathematical symbols, not abbreviations.
Карточка 106
Вопрос
How should a number and an SI unit symbol be spaced?
Ответ
Put a space between them: 25 m and 20 °C. In °C, the degree sign and C stay together.
Карточка 107
Вопрос
Both hertz and becquerel reduce to s⁻¹. When is each used?
Ответ
Use hertz (Hz) for periodic phenomena and becquerel (Bq) for activity referred to a radionuclide. The shared expression doesn't make the quantities interchangeable.
Карточка 108
Вопрос
Both gray and sievert reduce to m²·s⁻². What distinguishes them?
Ответ
Gray (Gy) is used for absorbed dose or kerma; sievert (Sv) is used for dose equivalent. The quantity context determines the special name.
Карточка 109
Вопрос
Radian and steradian both have coherent unit expression 1. What distinguishes them?
Ответ
Radian (rad) is used for plane angle; steradian (sr) is used for solid angle. Their symbols preserve the quantity context.
Карточка 110
Вопрос
For temperature intervals, how do kelvin and degrees Celsius compare?
Ответ
A change of 1 K equals a change of 1 °C. Their zero points differ, so absolute temperatures aren't numerically equal.
110 карточек
SI Units Flashcards: 7 Base Units & 22 Named Derived Units
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