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