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