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