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CLEP Prep/CLEP Natural Sciences
CLEP Exam

CLEP Natural Sciences Prep

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  • Complete ≥80% of your generated study plan
  • Take at least 3 full-length mock exams with a ≥75 average
  • Submit your exam score within 60 days of the exam date
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💰

$97

Exam Cost

⏱️

75 min

Time

🎓

3-6

Credits

✅

~50/80

Passing

What You'll Study

Unit 1: Biological Science

Cell structure, function, and reproductionGenetics, DNA, and heredityEvolution and natural selectionEcology: ecosystems, populations, and biodiversity

🎓 Khan Academy — specific sub-units

→ Cell structure & function→ Genetics & heredity→ Natural selection & evolution→ Ecology

Unit 2: Physical Science

Newton's laws and mechanicsEnergy, work, and thermodynamicsWaves, sound, and lightElectricity and magnetism fundamentals

🎓 Khan Academy — specific sub-units

→ Newton's laws→ Energy & work→ Waves & sound→ Electricity & magnetism

Unit 3: Earth & Space Science

Plate tectonics and geological processesAtmosphere, weather, and climateSolar system and stellar evolutionEarth's history and fossil record

🎓 Khan Academy — specific sub-units

→ Plate tectonics→ Climate & atmosphere→ Solar system & stars

Unit 4: Chemistry Fundamentals

Atomic structure and the periodic tableChemical bonding and molecular structureChemical reactions and stoichiometryAcids, bases, and solutions

🎓 Khan Academy — specific sub-units

→ Atomic structure & periodic table→ Chemical bonding→ Stoichiometry→ Acids, bases, pH

Unit 5: Scientific Method & History

Hypothesis testing and experimental designVariables, controls, and data analysisHistory of major scientific discoveriesEthics and societal impact of science

🎓 Khan Academy — specific sub-units

→ Scientific method→ Experimental design→ Statistics for science

About these external resources

Links below point to publicly available third-party study materials (Khan Academy, YouTube creators, Modern States, OpenStax, College Board, etc.). PrepLion does not own, host, or modify this content. We list links as a study aid only — each resource is the property of its respective owner and is subject to their terms of service.

All trademarks, course names, logos, and content remain the property of their respective owners. Khan Academy®, YouTube™, Modern States®, OpenStax®, and CLEP® are trademarks of their respective holders. PrepLion is not affiliated with, endorsed by, or sponsored by any of them. If you are a content owner and would like a link removed, contact contact@preplion.ai.

Linked content may be removed, paywalled, or changed by its owner at any time. We make no warranty as to its accuracy, availability, or suitability for any exam.

Study Guide

Topics, formulas, and key concepts

Flashcards

Spaced-repetition deck

Practice Test

Full-length timed exam

Before you start studying

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Free Resources We Recommend

The best free materials for CLEP Nat Sci. No affiliation, no kickback — just what actually works.

Modern States: Natural Sciences

Modern States (College Board partner)

Free full video course. Earn the free CLEP voucher after 70% completion.

OpenStax: Biology 2e + Chemistry + Physics

OpenStax (free, peer-reviewed)

CLEP Natural Sciences spans bio + phys sci — use OpenStax for each.

Khan Academy: Biology + Physics + Chemistry

Khan Academy

Broad science literacy across the three domains.

YouTube: CrashCourse

YouTube

Context videos across the natural sciences.

Links open in a new tab. PrepLion has no affiliation with these providers — we just think they're the best free options.

Course Notes

- OpenStax Biology 2e (CC BY 4.0): https://openstax.org/details/books/biology-2e - OpenStax College Physics (CC BY 4.0): https://openstax.org/details/books/college-physics - OpenStax Chemistry 2e (CC BY 4.0): https://openstax.org/details/books/chemistry-2e

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CLEP® is a registered trademark of College Board, which is not affiliated with PrepLion. All practice questions are original content.