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