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