Metric & SI Prefixes Flashcards

Metric & SI Prefixes flashcards — the free 24

Every question and answer on the free cards, written out. Check them against your own textbook before you spend anything.

quetta

Q — ×10³⁰, the largest SI prefix. Capital Q

ronna

R — ×10²⁷. Capital R

yotta

Y — ×10²⁴. Capital Y

zetta

Z — ×10²¹. Capital Z

exa

E — ×10¹⁸. Capital E

peta

P — ×10¹⁵. Capital P

tera

T — ×10¹². Capital T, which is also the symbol for the tesla

giga

G — ×10⁹. Capital G

mega

M — ×10⁶. Capital M; lower-case m is milli, 10⁹ times smaller

kilo

k — ×10³. Lower-case k; capital K is the kelvin, not a prefix

hecto

h — ×10². Lower-case h, which is also the symbol for the hour

deca

da — ×10¹. The only two-letter prefix symbol; NIST spells it 'deka'

deci

d — ×10⁻¹. Lower-case d, which is also the symbol for the day

centi

c — ×10⁻². Lower-case c

milli

m — ×10⁻³. Lower-case m; capital M is mega, 10⁹ times larger

micro

µ — ×10⁻⁶. Greek mu, the one prefix symbol that is not a Latin letter

nano

n — ×10⁻⁹. Lower-case n

pico

p — ×10⁻¹². Lower-case p

femto

f — ×10⁻¹⁵. Lower-case f

atto

a — ×10⁻¹⁸. Lower-case a

zepto

z — ×10⁻²¹. Lower-case z

yocto

y — ×10⁻²⁴. Lower-case y

ronto

r — ×10⁻²⁷. Lower-case r

quecto

q — ×10⁻³⁰, the smallest SI prefix. Lower-case q

Metric & SI Prefixes flashcards — questions people ask

How many cards are in the Metric & SI Prefixes flashcard deck?

The Metric & SI Prefixes deck on PuzzlePage has 24 cards, and all 24 are free to play and free to download with no account and no payment. 24 cards, because the SI defines exactly 24 prefixes — quetta (10³⁰) down to quecto (10⁻³⁰). That is the entire set, not a selection from it, and there is no 25th to pad the deck with.

What is on the metric & si prefixes flashcards?

Every SI prefix the BIPM defines, all 24 of them, including ronna, quetta, ronto and quecto. Front is the prefix; back is the symbol and the power of ten. Cards look like this: quetta → Q — ×10³⁰, the largest SI prefix. Capital Q; ronna → R — ×10²⁷. Capital R. The deck is written for grades 6–12 and filed under science.

Can I study metric & si prefixes flashcards online for free?

Yes. All 24 cards of the Metric & SI Prefixes deck play free in any web browser at puzzlepage.app, with no account, no app and no card details. It works on a phone, tablet, Chromebook, laptop or classroom projector. Practice mode flips through the cards with nothing scored; quiz mode makes you answer each card before it flips, times the run and scores it.

Are the metric & si prefixes flashcards accurate?

Every card in the Metric & SI Prefixes deck cites two independent published sources — two different organisations, not a standards body and a site reprinting it — and a script checks that, rather than taking the writer's word for it. A second specialist then re-verified the deck against sources of their own, without reading the citations first. That is the difference from a user-generated flashcard site, where the cards are whatever a stranger typed and nobody is accountable for them.

Can I print the metric & si prefixes flashcards?

Yes. The Metric & SI Prefixes cards are available as a printable double-sided PDF to cut up, as well as playable in the browser. The whole 24-card printable is free to download, with no account.

How should I use the Metric & SI Prefixes deck to revise?

Start in practice mode and go through the Metric & SI Prefixes deck once without scoring, to find out which cards you already know — the deck is dealt in a different order every time you open it, so you are recalling the card rather than its position. Then switch to quiz mode, which times and scores the run and lets you re-run only the cards you missed. Use the "flip deck" control to swap which side is the question: recognising an answer is much easier than producing one, so a deck you find easy one way round is usually the harder and more useful drill the other way. Two or three short sessions across a week beat one long one, which is the whole reason flashcards work.

What grade level are the metric & si prefixes flashcards for?

The Metric & SI Prefixes deck is written for grades 6–12. Because the cards are plain term-and-answer pairs, they are also used outside that band — by adults revising science, and by teachers running them as a whole-class starter on a projector.