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