CLEP exam prep

CLEP Natural Sciences Study Hub

Review biology and physical science as a connected system, with clear lessons and realistic practice.

2 free pop-up tests · 265 flashcards · 79 connected lessons
2 pop-up practice tests79 connected topics1 complete flashcard deck
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CLEP Natural Sciences Practice Center

Take a full practice test, review the explanations, then use the flashcards to repair the terms and ideas that slowed you down.

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CLEP Natural Sciences Study Blueprint

Open each area to see what to master. The bars show how this hub distributes its lessons, so you can plan study time without mistaking the map for an official exam weighting.

79 lessons
01 Cells, genetics, and evolutionConnect the molecular and cellular basis of life to heredity and change over time. 24lessons
30% of this study map
  • Cell structure, energy, division, and gene expression
  • Genetics, evolution, and biological diversity
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02 Organisms and ecologyStudy plant and animal systems within populations and ecosystems. 16lessons
20% of this study map
  • Structure, function, reproduction, and development
  • Ecology, populations, and environmental science
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03 Chemistry and matterUse particles, bonding, reactions, and solutions to explain material behavior. 17lessons
22% of this study map
  • Atomic structure, formulas, and bonding
  • Reactions, stoichiometry, solutions, acids, and gases
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04 Physics, Earth, and spaceApply physical relationships to motion, energy, waves, Earth systems, and astronomy. 14lessons
18% of this study map
  • Mechanics, energy, waves, sound, and light
  • Earth structure, weather, oceans, and the universe
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05 Scientific reasoning and dataInterpret measurements, experiments, graphs, tables, and evidence. 8lessons
10% of this study map
  • Variables, controls, uncertainty, and design
  • Quantitative reasoning and evidence-based conclusions
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Study-map shares describe the learning resources on this page. They are not presented as official test percentages.

Independent college-credit exam preparation

CLEP Natural Sciences Study Hub

Study biological and physical science in plain language, open the exact lesson you need, and use the chapter flashcards to check what you can explain without notes.

34 chapters · 208 lessons · 272 flashcards

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Biological ScienceLife, cells, heredity, organisms, and ecologyPhysical ScienceChemistry, physics, Earth, and space scienceChapter FlashcardsSearch or filter the complete key-term deckAll 208 LessonsJump directly to the topic on your study list

Choose your next move

If you are starting from the beginning, work through Biological Science first and then Physical Science. If you have already taken a diagnostic test, let your missed questions choose the chapter.

14biology chapters
18physical-science chapters
2data and experiment chapters
272key-term flashcards

Every CLEP Natural Sciences lesson

Each link opens the closest published teaching page in a new tab. Existing Biology, Chemistry, Physics, TEAS, ASVAB, and GED lessons are reused wherever they already cover the book topic.

208 lessons

Biological Science

Chapter 1: Nature of Life and Scientific Investigation

Chapter 2: Origin of Life, Evolution, and Natural Selection

Chapter 3: Classification and Diversity of Life

Chapter 4: Chemistry of Life

Chapter 5: Cell Structure and Function

Chapter 6: Cellular Energy: Photosynthesis and Respiration

Chapter 7: Cell Division

Chapter 8: DNA, RNA, and Gene Expression

Chapter 9: Genetics and Heredity

Chapter 10: Plant Structure, Function, and Reproduction

Chapter 11: Animal Biology and Human Body Systems

Chapter 12: Reproduction and Development

Chapter 13: Ecology and Ecosystems

Chapter 14: Population Biology and Environmental Science

Physical Science

Chapter 15: Measurement, Mathematics, and Scientific Problem Solving

Chapter 16: Matter and Atomic Structure

Chapter 17: Nuclear Science and Radioactivity

Chapter 18: Chemical Bonding

Chapter 19: Chemical Reactions

Chapter 20: Solutions, Acids, Bases, and Gases

Chapter 21: States of Matter and Thermodynamics

Chapter 22: Motion

Chapter 23: Forces and Newton's Laws

Chapter 24: Work, Energy, Momentum, and Machines

Chapter 25: Electricity and Magnetism

Chapter 26: Waves, Sound, and Light

Chapter 27: Astronomy: The Solar System

Chapter 28: Stars, Galaxies, and the Universe

Chapter 29: Earth's Structure and Plate Tectonics

Chapter 30: Rocks, Minerals, and Geologic Time

Chapter 31: Atmosphere, Weather, and Climate

Chapter 32: Oceans and the Water Cycle

Cross-Disciplinary CLEP Skills

Chapter 33: Graphs, Tables, and Scientific Data

Chapter 34: Experimental Design and Evidence

Use the hub like a tutor

After reading, name the main relationship in one sentence. Give one example and one tempting nonexample. If you cannot explain why the nonexample fails, return to that one section instead of rereading the whole chapter.

Ready for a focused review?

Open the flashcards, choose a chapter, and mark the terms you cannot explain in your own words. Those terms become today’s short study list.

Open CLEP Natural Sciences flashcards

These independent study materials are not official CLEP examinations or scaled-score reports. CLEP and College Board are registered marks of their respective owners, who do not endorse this site or its materials.

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Every lesson in one place

Open a lesson in a new tab and keep this hub nearby as your study home.

79 lessons
Browse the complete lesson directory
01Life Is a Pattern of Connected Properties 02How Scientific Investigation Builds an Answer 03Early Earth and the Origin-of-Life Question 04Populations Carry Heritable Variation 05Independent Evidence Reconstructs Life's History 06Names Are Tools, Not the Tree Itself 07Traits and DNA Reveal Branching History 08Keys Identify Organisms; Trees Explain Relationships 09Water Makes Cellular Chemistry Possible 10The Big Idea: Monomers, Polymers, and the Elements of Life 11Cell Theory and the Two Basic Kinds of Cells 12The Cell Membrane: A Selective Border 13How Cells Get and Spend Energy 14The Cell Cycle: Grow, Copy, Divide 15The DNA Molecule 16Gene Regulation and Biotechnology: Reading DNA With Care 17The Vocabulary of Inheritance 18Plant Bodies Are Modular and Still Growing 19Xylem and Phloem Connect Distant Organs 20Flowers Launch the Next Sporophyte Generation 21The Body Works as a Team 22Delivering Oxygen and Nutrients 23Control and Coordination 24Movement and Support 25Balance and Defense 26What the Reproductive System Does 27The Male Reproductive System 28Ecology Works Across Connected Levels 29Populations Grow, but Environments Set Limits 30Energy Flows Through Food Webs 31Biodiversity, Resilience, and Human Choices 32Thinking in Environmental Systems 33The Metric System and Common Science Units 34Accuracy and Precision 35Inside the Atom 36Reading the Nucleus 37Elementary Particles: A CLEP-Level Map 38Why Atoms Bond 39Reading Chemical Formulas 40What a Reaction Rate Is 41What Is a Solution? 42What Acids and Bases Are 43Conceptual Gas Relationships 44Energy and Temperature Change 45Density, Pressure, and Buoyancy 46Position and Reference Frames 47Systems, Net Force, and Free-Body Diagrams 48Energy: A New Way to Predict Change 49Momentum, Impulse, and Machines 50Charge Flow and Energy Transfer 51Magnetic Fields and Induction 52A Disturbance on the Move 53Earth's Motion, Day and Night, and Seasons 54Moon Phases, Eclipses, and Tides 55The Solar System and Its Objects 56Stars, Galaxies, and the Universe 57Earth Systems and the Solid Earth 58Earth Systems and Internal Layers 59Continental Drift, Plates, and the Evidence 60Plate Boundaries: Pull Apart, Meet, or Slide Past 61Earthquakes, Faults, and Seismic Waves 62Volcanoes, Mountains, and Changing Crust 63Minerals and Their Identification 64Igneous, Sedimentary, and Metamorphic Rocks 65The Rock Cycle, Weathering, Erosion, and Geologic Time 66The Atmosphere and Air Pressure 67Heating, Humidity, and Clouds 68Wind, Fronts, and Storms 69Climate, Greenhouse Gases, and Ozone 70Water Moves Through Earth Systems 71Groundwater and Glaciers Shape Land 72Ocean Water Changes with Depth 73Waves, Tides, Currents, and Ocean Resources 74Reading a Data Table 75The Three Kinds of Variables 76From Observation to Hypothesis 77Variation, Uncertainty, and Null Results 78Drawing a Conclusion the Data Supports 79Correlation Is Not Causation
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