Turn your zepto notes into flashcards with AI
Upload lecture slides, PDFs, notes or photos of a textbook page. DeckOwl builds flashcards on zepto and the other SI prefixes, then schedules reviews with spaced repetition.
How zepto flashcards help with SI prefixes
Zepto is the SI prefix for 10^-21, and it appears in physics, chemistry and engineering courses more often than students expect. If your class covers it, zepto flashcards can be built from your own lecture slides or textbook PDF in a few minutes.
- Pair each prefix symbol with its power of ten, such as z with 10^-21.
- Practice conversions between neighboring prefixes, like 1 fs = 10^6 zs.
- Keep units in the answer, such as zm for zeptometer or zs for zeptosecond.
- Review the cards you miss more often than the ones you already know.
From your own material
Upload a PDF, PPTX, DOCX, plain-text notes or a photo of a page. Text recognition reads images, so handwritten or printed prefix tables still work.
Spaced repetition
Cards you miss come back sooner and cards you know fade to longer gaps, so the prefixes stay in memory through the exam.
Quizzes and mind maps
Turn the same notes into multiple choice, true/false or short answer questions with explanations, or into a mind map of the SI prefixes.
How it works
Upload your notes
Add the slides, PDF or photo that covers zepto and the prefixes around it.
Review the cards
DeckOwl drafts flashcards with the prefix on one side and its factor on the other. Edit any card before you study.
Study on a schedule
Practice in the browser on the free plan. Plus adds exports to PDF, DOCX, Anki and CSV.
Good cards pair the symbol z with its factor, then ask you to convert between neighbors such as femto (10^-15) and atto (10^-18). Spaced repetition brings back the ones you miss, so the prefixes are still there when the exam asks for them.
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Frequently asked questions
What does zepto mean in the SI system?
Zepto is the SI prefix with the symbol z, and it stands for a factor of 10^-21, or one sextillionth. It is used with units such as meter, second and gram.
How many zeptoseconds are in one femtosecond?
One femtosecond is 10^-15 seconds and one zeptosecond is 10^-21 seconds, so one femtosecond equals one million zeptoseconds. Writing the conversion as powers of ten makes it easier to check.
Can DeckOwl export zepto flashcards to Anki?
Yes, but exports are a paid feature. The Plus plan at $99.90/year or $9.99/month includes PDF, DOCX, Anki and CSV export, and the free plan allows 3 generations per month with study in the browser.
Do I need a credit card to try it?
No. You can start on the free plan without a credit card, and students get 40% off with a school email.
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