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Free SI Units & Prefixes Flashcards
Every science course assumes the SI system is automatic — base units, derived units, and the prefix ladder from nano to giga. These cards make the assumed knowledge actual knowledge.
Study these 10 starter cards
QUESTION
Tap the card to reveal the answer
QWhat are the SI base units for length, mass, and time?
AMeter (m), kilogram (kg), second (s)
QWhat is the SI unit of temperature?
AKelvin (K)
QWhat is the SI unit of electric current?
AAmpere (A)
QWhat does the prefix kilo- mean?
A×1,000 (10³)
QWhat does the prefix milli- mean?
A×0.001 (10⁻³)
QWhat does the prefix micro- (µ) mean?
A×10⁻⁶ (one millionth)
QWhat does the prefix nano- mean?
A×10⁻⁹ (one billionth)
QWhat does the prefix giga- mean?
A×10⁹ (one billion)
QWhat is the derived SI unit of energy?
AThe joule (J) = N·m
QWhat is the derived SI unit of power?
AThe watt (W) = J/s
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Reading answers is recognition — remembering them next month takes spaced repetition. Build your own si units & prefixes deck and we'll schedule every review at the right moment.
Create your free deck →How to study si units & prefixes with flashcards
- One fact per card. Drill prefixes as powers of ten ("kilo = 10³") — conversions become moving decimal points instead of math.
- Rate honestly. After each card, choose Again, Hard, Good, or Easy — the spaced repetition algorithm uses your answer to decide when the card returns, right before you'd forget it.
- A few minutes daily beats marathons. Ten new cards a day is roughly 3,650 a year, retained. Deep dives: How to make flashcards that actually work · The spacing effect, explained · How to study for exams with flashcards.
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