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.
حول هذه الرزمة
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.
بطاقات هذه الرزمة
البطاقة ١
السؤال
What is the SI base unit for time?
الإجابة
second (s).
البطاقة ٢
السؤال
What is the SI base unit for length?
الإجابة
metre (m).
البطاقة ٣
السؤال
What is the SI base unit for mass?
الإجابة
kilogram (kg).
البطاقة ٤
السؤال
What is the SI base unit for electric current?
الإجابة
ampere (A).
البطاقة ٥
السؤال
What is the SI base unit for thermodynamic temperature?
الإجابة
kelvin (K).
البطاقة ٦
السؤال
What is the SI base unit for amount of substance?
الإجابة
mole (mol).
البطاقة ٧
السؤال
What is the SI base unit for luminous intensity?
الإجابة
candela (cd).
البطاقة ٨
السؤال
Which SI base quantity uses the second (s)?
الإجابة
Time.
البطاقة ٩
السؤال
Which SI base quantity uses the metre (m)?
الإجابة
Length.
البطاقة ١٠
السؤال
Which SI base quantity uses the kilogram (kg)?
الإجابة
Mass.
البطاقة ١١
السؤال
Which SI base quantity uses the ampere (A)?
الإجابة
Electric current.
البطاقة ١٢
السؤال
Which SI base quantity uses the kelvin (K)?
الإجابة
Thermodynamic temperature.
البطاقة ١٣
السؤال
Which SI base quantity uses the mole (mol)?
الإجابة
Amount of substance.
البطاقة ١٤
السؤال
Which SI base quantity uses the candela (cd)?
الإجابة
Luminous intensity.
البطاقة ١٥
السؤال
Which SI unit with a special name is used for plane angle?
الإجابة
radian (rad).
البطاقة ١٦
السؤال
Which SI unit with a special name is used for energy, work, or amount of heat?
الإجابة
joule (J).
البطاقة ١٧
السؤال
Which SI unit with a special name is used for electric resistance?
الإجابة
ohm (Ω).
البطاقة ١٨
السؤال
Which SI unit with a special name is used for Celsius temperature?
الإجابة
degree Celsius (°C).
البطاقة ١٩
السؤال
Which SI unit with a special name is used for dose equivalent?
الإجابة
sievert (Sv).
البطاقة ٢٠
السؤال
Which SI unit with a special name is used for force?
الإجابة
newton (N).
البطاقة ٢١
السؤال
Which SI unit with a special name is used for electric potential difference?
الإجابة
volt (V).
البطاقة ٢٢
السؤال
Which SI unit with a special name is used for magnetic flux density?
الإجابة
tesla (T).
البطاقة ٢٣
السؤال
Which SI unit with a special name is used for activity referred to a radionuclide?
الإجابة
becquerel (Bq).
البطاقة ٢٤
السؤال
Which SI unit with a special name is used for solid angle?
الإجابة
steradian (sr).
البطاقة ٢٥
السؤال
Which SI unit with a special name is used for power or radiant flux?
الإجابة
watt (W).
البطاقة ٢٦
السؤال
Which SI unit with a special name is used for electric conductance?
الإجابة
siemens (S).
البطاقة ٢٧
السؤال
Which SI unit with a special name is used for luminous flux?
الإجابة
lumen (lm).
البطاقة ٢٨
السؤال
Which SI unit with a special name is used for catalytic activity?
الإجابة
katal (kat).
البطاقة ٢٩
السؤال
Which SI unit with a special name is used for pressure or stress?
الإجابة
pascal (Pa).
البطاقة ٣٠
السؤال
Which SI unit with a special name is used for capacitance?
الإجابة
farad (F).
البطاقة ٣١
السؤال
Which SI unit with a special name is used for inductance?
الإجابة
henry (H).
البطاقة ٣٢
السؤال
Which SI unit with a special name is used for absorbed dose or kerma?
الإجابة
gray (Gy).
البطاقة ٣٣
السؤال
Which SI unit with a special name is used for frequency?
الإجابة
hertz (Hz).
البطاقة ٣٤
السؤال
Which SI unit with a special name is used for electric charge?
الإجابة
coulomb (C).
البطاقة ٣٥
السؤال
Which SI unit with a special name is used for magnetic flux?
الإجابة
weber (Wb).
البطاقة ٣٦
السؤال
Which SI unit with a special name is used for illuminance?
الإجابة
lux (lx).
البطاقة ٣٧
السؤال
What quantity uses the radian (rad)?
الإجابة
Plane angle.
البطاقة ٣٨
السؤال
What quantity uses the joule (J)?
الإجابة
Energy, work, and amount of heat.
البطاقة ٣٩
السؤال
What quantity uses the ohm (Ω)?
الإجابة
Electric resistance.
البطاقة ٤٠
السؤال
What quantity uses the degree Celsius (°C)?
الإجابة
Celsius temperature.
البطاقة ٤١
السؤال
What quantity uses the sievert (Sv)?
الإجابة
Dose equivalent.
البطاقة ٤٢
السؤال
What quantity uses the newton (N)?
الإجابة
Force.
البطاقة ٤٣
السؤال
What quantity uses the volt (V)?
الإجابة
Electric potential difference.
البطاقة ٤٤
السؤال
What quantity uses the tesla (T)?
الإجابة
Magnetic flux density.
البطاقة ٤٥
السؤال
What quantity uses the becquerel (Bq)?
الإجابة
Activity referred to a radionuclide.
البطاقة ٤٦
السؤال
What quantity uses the steradian (sr)?
الإجابة
Solid angle.
البطاقة ٤٧
السؤال
What quantity uses the watt (W)?
الإجابة
Power and radiant flux.
البطاقة ٤٨
السؤال
What quantity uses the siemens (S)?
الإجابة
Electric conductance.
البطاقة ٤٩
السؤال
What quantity uses the lumen (lm)?
الإجابة
Luminous flux.
البطاقة ٥٠
السؤال
What quantity uses the katal (kat)?
الإجابة
Catalytic activity.
البطاقة ٥١
السؤال
What quantity uses the pascal (Pa)?
الإجابة
Pressure and stress.
البطاقة ٥٢
السؤال
What quantity uses the farad (F)?
الإجابة
Capacitance.
البطاقة ٥٣
السؤال
What quantity uses the henry (H)?
الإجابة
Inductance.
البطاقة ٥٤
السؤال
What quantity uses the gray (Gy)?
الإجابة
Absorbed dose and kerma.
البطاقة ٥٥
السؤال
What quantity uses the hertz (Hz)?
الإجابة
Frequency.
١١٠ بطاقات
SI Units Flashcards: 7 Base Units & 22 Named Derived Units
ادرس هذه الرزمة مجانًاسيفتح تطبيق Flashcards لتبدأ الدراسة.
البطاقة ٥٦
السؤال
What quantity uses the coulomb (C)?
الإجابة
Electric charge.
البطاقة ٥٧
السؤال
What quantity uses the weber (Wb)?
الإجابة
Magnetic flux.
البطاقة ٥٨
السؤال
What quantity uses the lux (lx)?
الإجابة
Illuminance.
البطاقة ٥٩
السؤال
Express the radian (rad) in coherent SI base units.
الإجابة
1. The symbol rad keeps the plane-angle context explicit.
البطاقة ٦٠
السؤال
Express the joule (J) in coherent SI base units.
الإجابة
kg·m²·s⁻².
البطاقة ٦١
السؤال
Express the ohm (Ω) in coherent SI base units.
الإجابة
kg·m²·s⁻³·A⁻².
البطاقة ٦٢
السؤال
Express the degree Celsius (°C) in coherent SI base units.
الإجابة
K. A degree Celsius and a kelvin have the same size; their zero points differ.
البطاقة ٦٣
السؤال
Express the sievert (Sv) in coherent SI base units.
الإجابة
m²·s⁻².
البطاقة ٦٤
السؤال
Express the newton (N) in coherent SI base units.
الإجابة
kg·m·s⁻².
البطاقة ٦٥
السؤال
Express the volt (V) in coherent SI base units.
الإجابة
kg·m²·s⁻³·A⁻¹.
البطاقة ٦٦
السؤال
Express the tesla (T) in coherent SI base units.
الإجابة
kg·s⁻²·A⁻¹.
البطاقة ٦٧
السؤال
Express the becquerel (Bq) in coherent SI base units.
الإجابة
s⁻¹. Use Bq for stochastic nuclear transformations, not periodic phenomena.
البطاقة ٦٨
السؤال
Express the steradian (sr) in coherent SI base units.
الإجابة
1. The symbol sr keeps the solid-angle context explicit.
البطاقة ٦٩
السؤال
Express the watt (W) in coherent SI base units.
الإجابة
kg·m²·s⁻³.
البطاقة ٧٠
السؤال
Express the siemens (S) in coherent SI base units.
الإجابة
kg⁻¹·m⁻²·s³·A².
البطاقة ٧١
السؤال
Express the lumen (lm) in coherent SI base units.
الإجابة
cd·sr. Since sr has unit one, this is dimensionally cd; sr keeps the solid-angle context explicit.
البطاقة ٧٢
السؤال
Express the katal (kat) in coherent SI base units.
الإجابة
mol·s⁻¹.
البطاقة ٧٣
السؤال
Express the pascal (Pa) in coherent SI base units.
الإجابة
kg·m⁻¹·s⁻².
البطاقة ٧٤
السؤال
Express the farad (F) in coherent SI base units.
الإجابة
kg⁻¹·m⁻²·s⁴·A².
البطاقة ٧٥
السؤال
Express the henry (H) in coherent SI base units.
الإجابة
kg·m²·s⁻²·A⁻².
البطاقة ٧٦
السؤال
Express the gray (Gy) in coherent SI base units.
الإجابة
m²·s⁻².
البطاقة ٧٧
السؤال
Express the hertz (Hz) in coherent SI base units.
الإجابة
s⁻¹. Use Hz for periodic phenomena.
البطاقة ٧٨
السؤال
Express the coulomb (C) in coherent SI base units.
الإجابة
A·s.
البطاقة ٧٩
السؤال
Express the weber (Wb) in coherent SI base units.
الإجابة
kg·m²·s⁻²·A⁻¹.
البطاقة ٨٠
السؤال
Express the lux (lx) in coherent SI base units.
الإجابة
cd·sr·m⁻². Since sr has unit one, this is dimensionally cd·m⁻²; sr keeps the solid-angle context explicit.
البطاقة ٨١
السؤال
For plane angle, which named SI unit has the coherent base-unit expression 1?
الإجابة
radian (rad).
البطاقة ٨٢
السؤال
For energy, work, or amount of heat, which named SI unit has the coherent base-unit expression kg·m²·s⁻²?
الإجابة
joule (J).
البطاقة ٨٣
السؤال
For electric resistance, which named SI unit has the coherent base-unit expression kg·m²·s⁻³·A⁻²?
الإجابة
ohm (Ω).
البطاقة ٨٤
السؤال
For Celsius temperature, which named SI unit has the coherent base-unit expression K?
الإجابة
degree Celsius (°C).
البطاقة ٨٥
السؤال
For dose equivalent, which named SI unit has the coherent base-unit expression m²·s⁻²?
الإجابة
sievert (Sv).
البطاقة ٨٦
السؤال
For force, which named SI unit has the coherent base-unit expression kg·m·s⁻²?
الإجابة
newton (N).
البطاقة ٨٧
السؤال
For electric potential difference, which named SI unit has the coherent base-unit expression kg·m²·s⁻³·A⁻¹?
الإجابة
volt (V).
البطاقة ٨٨
السؤال
For magnetic flux density, which named SI unit has the coherent base-unit expression kg·s⁻²·A⁻¹?
الإجابة
tesla (T).
البطاقة ٨٩
السؤال
For activity referred to a radionuclide, which named SI unit has the coherent base-unit expression s⁻¹?
الإجابة
becquerel (Bq).
البطاقة ٩٠
السؤال
For solid angle, which named SI unit has the coherent base-unit expression 1?
الإجابة
steradian (sr).
البطاقة ٩١
السؤال
For power or radiant flux, which named SI unit has the coherent base-unit expression kg·m²·s⁻³?
الإجابة
watt (W).
البطاقة ٩٢
السؤال
For electric conductance, which named SI unit has the coherent base-unit expression kg⁻¹·m⁻²·s³·A²?
الإجابة
siemens (S).
البطاقة ٩٣
السؤال
For luminous flux, which named SI unit has the coherent base-unit expression cd·sr?
الإجابة
lumen (lm).
البطاقة ٩٤
السؤال
For catalytic activity, which named SI unit has the coherent base-unit expression mol·s⁻¹?
الإجابة
katal (kat).
البطاقة ٩٥
السؤال
For pressure or stress, which named SI unit has the coherent base-unit expression kg·m⁻¹·s⁻²?
الإجابة
pascal (Pa).
البطاقة ٩٦
السؤال
For capacitance, which named SI unit has the coherent base-unit expression kg⁻¹·m⁻²·s⁴·A²?
الإجابة
farad (F).
البطاقة ٩٧
السؤال
For inductance, which named SI unit has the coherent base-unit expression kg·m²·s⁻²·A⁻²?
الإجابة
henry (H).
البطاقة ٩٨
السؤال
For absorbed dose or kerma, which named SI unit has the coherent base-unit expression m²·s⁻²?
الإجابة
gray (Gy).
البطاقة ٩٩
السؤال
For frequency, which named SI unit has the coherent base-unit expression s⁻¹?
الإجابة
hertz (Hz).
البطاقة ١٠٠
السؤال
For electric charge, which named SI unit has the coherent base-unit expression A·s?
الإجابة
coulomb (C).
البطاقة ١٠١
السؤال
For magnetic flux, which named SI unit has the coherent base-unit expression kg·m²·s⁻²·A⁻¹?
الإجابة
weber (Wb).
البطاقة ١٠٢
السؤال
For illuminance, which named SI unit has the coherent base-unit expression cd·sr·m⁻²?
الإجابة
lux (lx).
البطاقة ١٠٣
السؤال
How are SI unit names capitalized in English?
الإجابة
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.
البطاقة ١٠٤
السؤال
What determines capitalization in an SI unit symbol?
الإجابة
Symbols derived from proper names start with a capital letter; the others are lowercase. Case is mandatory and meaningful.
البطاقة ١٠٥
السؤال
How do SI unit symbols behave in plurals and at sentence endings?
الإجابة
They never take a plural ending, and they take no period unless the symbol ends a sentence. Unit symbols are mathematical symbols, not abbreviations.
البطاقة ١٠٦
السؤال
How should a number and an SI unit symbol be spaced?
الإجابة
Put a space between them: 25 m and 20 °C. In °C, the degree sign and C stay together.
البطاقة ١٠٧
السؤال
Both hertz and becquerel reduce to s⁻¹. When is each used?
الإجابة
Use hertz (Hz) for periodic phenomena and becquerel (Bq) for activity referred to a radionuclide. The shared expression doesn't make the quantities interchangeable.
البطاقة ١٠٨
السؤال
Both gray and sievert reduce to m²·s⁻². What distinguishes them?
الإجابة
Gray (Gy) is used for absorbed dose or kerma; sievert (Sv) is used for dose equivalent. The quantity context determines the special name.
البطاقة ١٠٩
السؤال
Radian and steradian both have coherent unit expression 1. What distinguishes them?
الإجابة
Radian (rad) is used for plane angle; steradian (sr) is used for solid angle. Their symbols preserve the quantity context.
البطاقة ١١٠
السؤال
For temperature intervals, how do kelvin and degrees Celsius compare?
الإجابة
A change of 1 K equals a change of 1 °C. Their zero points differ, so absolute temperatures aren't numerically equal.
١١٠ بطاقات
SI Units Flashcards: 7 Base Units & 22 Named Derived Units
سيفتح تطبيق Flashcards لتبدأ الدراسة.