Science

Astronomy

47 practices

Crash Course Astronomy Introduction to Astronomy 17 questions Play Crash Course Astronomy Naked Eye Observations 18 questions Play Crash Course Astronomy Cycles in the Sky 17 questions Play Crash Course Astronomy Moon Phases 15 questions Play Crash Course Astronomy Eclipses 17 questions Play Crash Course Astronomy Telescopes 16 questions Play Crash Course Astronomy The Gravity of the Situation 17 questions Play Crash Course Astronomy Tides 14 questions Play Crash Course Astronomy Introduction to the Solar System 16 questions Play Crash Course Astronomy The Sun 15 questions Play Crash Course Astronomy The Earth 16 questions Play Crash Course Astronomy The Moon 15 questions Play Crash Course Astronomy Mercury 15 questions Play Crash Course Astronomy Venus 16 questions Play Crash Course Astronomy Mars 15 questions Play Crash Course Astronomy Jupiter 15 questions Play Crash Course Astronomy Jupiter's Moons 14 questions Play Crash Course Astronomy Saturn 15 questions Play Crash Course Astronomy Uranus & Neptune 15 questions Play Crash Course Astronomy Asteroids 15 questions Play Crash Course Astronomy Comets 14 questions Play Crash Course Astronomy The Oort Cloud 14 questions Play Crash Course Astronomy Meteors 15 questions Play Crash Course Astronomy Light 15 questions Play Crash Course Astronomy Distances 14 questions Play Crash Course Astronomy Stars 14 questions Play Crash Course Astronomy Exoplanets 14 questions Play Crash Course Astronomy Brown Dwarfs 14 questions Play Crash Course Astronomy Low Mass Stars 14 questions Play Crash Course Astronomy White Dwarfs & Planetary Nebulae 15 questions Play Crash Course Astronomy High Mass Stars 14 questions Play Crash Course Astronomy Neutron Stars 14 questions Play Crash Course Astronomy Black Holes 14 questions Play Crash Course Astronomy Binary and Multiple Stars 14 questions Play Crash Course Astronomy Star Clusters 14 questions Play Crash Course Astronomy Nebulae 14 questions Play Crash Course Astronomy The Milky Way 14 questions Play Crash Course Astronomy Galaxies, part 1 14 questions Play Crash Course Astronomy Galaxies, part 2 17 questions Play Crash Course Astronomy Gamma-Ray Bursts 14 questions Play Crash Course Astronomy Dark Matter 14 questions Play Crash Course Astronomy The Big Bang, Cosmology part 1 15 questions Play Crash Course Astronomy Dark Energy, Cosmology part 2 14 questions Play Crash Course Astronomy A Brief History of the Universe 15 questions Play Crash Course Astronomy Deep Time 14 questions Play Crash Course Astronomy Everything, The Universe...And Life 13 questions Play Crash Course Astronomy Explore The Solar System: 360 Degree Interactive Tour 7 questions Play Show all 47

Biology

50 practices

Crash Course Biology Introduction to Biology 17 questions Play Crash Course Biology The Scientific Method 18 questions Play Crash Course Biology What Biologists Do 17 questions Play Crash Course Biology How Life is Organized 17 questions Play Crash Course Biology Intro to Ecology: Why Did All These Elephants Die? 18 questions Play Crash Course Biology Community Ecology: Interspecies Interactions 18 questions Play Crash Course Biology Population Ecology: How We Saved the Bald Eagle 17 questions Play Crash Course Biology What is Climate Change? 17 questions Play Crash Course Biology The Effects of Climate Change 16 questions Play Crash Course Biology Conservation Biology: Sixth Mass Extinction? 18 questions Play Crash Course Biology Intro to Evolution: What We Can Learn From a Giraffe's Neck 16 questions Play Crash Course Biology Microevolution: What's An Allele Got to Do With It? 17 questions Play Crash Course Biology Natural Selection: Life's Way of Stayin' Alive 16 questions Play Crash Course Biology Population Genetics: Why do we have different skin colors? 16 questions Play Crash Course Biology Speciation: Where Do Species Come From? 16 questions Play Crash Course Biology Evolutionary History: The Timeline of Life 15 questions Play Crash Course Biology Phylogeny: How We're All Related 16 questions Play Crash Course Biology Biological Diversity, Butts, and the Tree of Life 16 questions Play Crash Course Biology Human Evolution: We Didn't Evolve From Chimps 16 questions Play Crash Course Biology Carbon & Biological Molecules: What is Life Made Of? 16 questions Play Crash Course Biology The Unexpected Truth About Water 16 questions Play Crash Course Biology Microscopes: How We See What We Can't See 15 questions Play Crash Course Biology A Tour of the Cell 16 questions Play Crash Course Biology Cell Membranes: How Does Stuff Get Into Your Cells? 15 questions Play Crash Course Biology Why Do Cells Need to Communicate? 13 questions Play Crash Course Biology Chemical Reactions in Biology 16 questions Play Crash Course Biology Cellular Respiration: Do Cells Breathe? 15 questions Play Crash Course Biology Photosynthesis: The Original Solar Power 16 questions Play Crash Course Biology Mitosis & the Cell Cycle: How Cells Clone Themselves 14 questions Play Crash Course Biology Meiosis: Why Are All Humans Unique? 14 questions Play Crash Course Biology Intro to Genetics: Why Your Cat Looks Like That 14 questions Play Crash Course Biology Genetic Traits: Nature? Nurture? Not That Simple 15 questions Play Crash Course Biology DNA Structure & Replication: Our Instruction Manual for Existing 15 questions Play Crash Course Biology Transcription: How mRNA Helped Save Lives 14 questions Play Crash Course Biology Translation: How RNA Gets Translated into Protein Power 14 questions Play Crash Course Biology How Genes Express Themselves 14 questions Play Crash Course Biology Genetic Mutations: Is Drinking Milk a Super Power? 15 questions Play Crash Course Biology Bacterial DNA & Genetics 14 questions Play Crash Course Biology Viruses & Vaccines: How Do Vaccines Work? 15 questions Play Crash Course Biology Bioinformatics: How Data Saves Lives 14 questions Play Crash Course Biology Multicellular Function: Why We Aren't Just One Big Cell 14 questions Play Crash Course Biology Plant Anatomy & Physiology: Plants Are Hardcore 16 questions Play Crash Course Biology How Animals Turn Resources Into Waste: The Poop Episode 15 questions Play Crash Course Biology Animal Infrastructure: Why You're More Than Goo 15 questions Play Crash Course Biology Animal Defense Systems: How Skin, Snot, and Cells Keep Us Healthy 15 questions Play Crash Course Biology Nervous & Endocrine Systems: What Really Happens When You Step on a Lego 15 questions Play Crash Course Biology Sexual & Asexual Reproduction: How Animals Do It 13 questions Play Crash Course Biology Gender, Sex, & Sexuality: What's the Difference? 14 questions Play Crash Course Biology Animal Behavior: Why This Toad Is Bad at Jumping 12 questions Play Crash Course Biology Biology and You: The Dr. Sammy Show 13 questions Play Show all 50

Anatomy & Physiology

47 practices

Crash Course Anatomy & Physiology Introduction to Anatomy & Physiology 19 questions Play Crash Course Anatomy & Physiology Tissues, Part 1 18 questions Play Crash Course Anatomy & Physiology Tissues, Part 2 - Epithelial Tissue 17 questions Play Crash Course Anatomy & Physiology Tissues, Part 3 - Connective Tissues 18 questions Play Crash Course Anatomy & Physiology Tissues, Part 4 - Types of Connective Tissues 18 questions Play Crash Course Anatomy & Physiology The Integumentary System, Part 1 - Skin Deep 18 questions Play Crash Course Anatomy & Physiology The Integumentary System, Part 2 - Skin Deeper 18 questions Play Crash Course Anatomy & Physiology The Nervous System, Part 1 17 questions Play Crash Course Anatomy & Physiology The Nervous System, Part 2 - Action! Potential! 17 questions Play Crash Course Anatomy & Physiology The Nervous System, Part 3 - Synapses! 17 questions Play Crash Course Anatomy & Physiology Central Nervous System 18 questions Play Crash Course Anatomy & Physiology Peripheral Nervous System 16 questions Play Crash Course Anatomy & Physiology Autonomic Nervous System 15 questions Play Crash Course Anatomy & Physiology Sympathetic Nervous System 15 questions Play Crash Course Anatomy & Physiology Parasympathetic Nervous System 16 questions Play Crash Course Anatomy & Physiology Taste & Smell 18 questions Play Crash Course Anatomy & Physiology Hearing & Balance 16 questions Play Crash Course Anatomy & Physiology Vision 17 questions Play Crash Course Anatomy & Physiology The Skeletal System 17 questions Play Crash Course Anatomy & Physiology Joints 16 questions Play Crash Course Anatomy & Physiology Muscles, Part 1 - Muscle Cells 17 questions Play Crash Course Anatomy & Physiology Muscles, Part 2 - Organismal Level 17 questions Play Crash Course Anatomy & Physiology Endocrine System, Part 1 - Glands & Hormones 17 questions Play Crash Course Anatomy & Physiology Endocrine System, Part 2 - Hormone Cascades 15 questions Play Crash Course Anatomy & Physiology The Heart, Part 1 - Under Pressure 16 questions Play Crash Course Anatomy & Physiology The Heart, Part 2 - Heart Throbs 15 questions Play Crash Course Anatomy & Physiology Blood Vessels, Part 1 - Form and Function 15 questions Play Crash Course Anatomy & Physiology Blood Vessels, Part 2 14 questions Play Crash Course Anatomy & Physiology Blood, Part 1 - True Blood 16 questions Play Crash Course Anatomy & Physiology Blood, Part 2 - There Will Be Blood 16 questions Play Crash Course Anatomy & Physiology Respiratory System, Part 1 15 questions Play Crash Course Anatomy & Physiology Respiratory System, Part 2 14 questions Play Crash Course Anatomy & Physiology Digestive System, Part 1 15 questions Play Crash Course Anatomy & Physiology Digestive System, Part 2 15 questions Play Crash Course Anatomy & Physiology Digestive System, Part 3 16 questions Play Crash Course Anatomy & Physiology Metabolism & Nutrition, Part 1 15 questions Play Crash Course Anatomy & Physiology Metabolism & Nutrition, Part 2 14 questions Play Crash Course Anatomy & Physiology Urinary System, Part 1 15 questions Play Crash Course Anatomy & Physiology Urinary System, Part 2 14 questions Play Crash Course Anatomy & Physiology Reproductive System, Part 1 - Female Reproductive System 15 questions Play Crash Course Anatomy & Physiology Reproductive System, Part 2 - Male Reproductive System 14 questions Play Crash Course Anatomy & Physiology Reproductive System, Part 3 - Sex & Fertilization 12 questions Play Crash Course Anatomy & Physiology Reproductive System, Part 4 - Pregnancy & Development 15 questions Play Crash Course Anatomy & Physiology Lymphatic System 14 questions Play Crash Course Anatomy & Physiology Immune System, Part 1 15 questions Play Crash Course Anatomy & Physiology Immune System, Part 2 14 questions Play Crash Course Anatomy & Physiology Immune System, Part 3 14 questions Play Show all 47

Zoology

14 practices

Crash Course Zoology Ancestral & Weird Senses 19 questions Play Crash Course Zoology Animals Working Together 18 questions Play Crash Course Zoology Diversity of Bodies & Sizes (but mostly crabs) 18 questions Play Crash Course Zoology Brainy & Brainless Animals 19 questions Play Crash Course Zoology Frontiers in Zoology 15 questions Play Crash Course Zoology How Animals Hear 19 questions Play Crash Course Zoology How Animals See 18 questions Play Crash Course Zoology How & What Animals Eat 20 questions Play Crash Course Zoology What's the Most "Animal" Animal? 19 questions Play Crash Course Zoology Parasites 17 questions Play Crash Course Zoology Phylogenetic Mysteries 18 questions Play Crash Course Zoology Reproduction 19 questions Play Crash Course Zoology What is a Species? 17 questions Play Crash Course Zoology What is an Animal? 18 questions Play Show all 14

Botany

15 practices

Crash Course Botany What is Botany? 17 questions Play Crash Course Botany What Are Plants Made Of? 19 questions Play Crash Course Botany Plant Cells & Hormones 17 questions Play Crash Course Botany What Do These Creepy Plant Mouths Do? (Plant Tissues) 16 questions Play Crash Course Botany Photosynthesis and Cellular Respiration 17 questions Play Crash Course Botany How Did Plants Evolve? 16 questions Play Crash Course Botany How Do We Categorize Plants? 16 questions Play Crash Course Botany Why Don't These Plants Need Seeds? (Moss and Ferns) 19 questions Play Crash Course Botany Why Do Flowers Exist? (Gymnosperms & Angiosperms) 19 questions Play Crash Course Botany What Do Pea Plants Have To Do With Your Eye Color? (Mendelian Genetics) 16 questions Play Crash Course Botany GMOs are Nothing New: Plant Breeding & Gene Editing 15 questions Play Crash Course Botany The Secret Social Lives of Plants (Population & Community Ecology) 15 questions Play Crash Course Botany How We ALL Get Our Energy (Plants & Ecosystems) 15 questions Play Crash Course Botany Can Planting Trees Fix Climate Change? (Plants & Biomes) 15 questions Play Crash Course Botany The Future of Botany 15 questions Play Show all 15

Physics

46 practices

Crash Course Physics Motion in a Straight Line 18 questions Play Crash Course Physics Derivatives 18 questions Play Crash Course Physics Integrals 17 questions Play Crash Course Physics Vectors and 2D Motion 18 questions Play Crash Course Physics Newton's Laws 17 questions Play Crash Course Physics Friction 17 questions Play Crash Course Physics Uniform Circular Motion 16 questions Play Crash Course Physics Newtonian Gravity 15 questions Play Crash Course Physics Work, Energy, and Power 17 questions Play Crash Course Physics Collisions 16 questions Play Crash Course Physics Rotational Motion 15 questions Play Crash Course Physics Torque 16 questions Play Crash Course Physics Statics 16 questions Play Crash Course Physics Fluids at Rest 17 questions Play Crash Course Physics Fluids in Motion 16 questions Play Crash Course Physics Simple Harmonic Motion 15 questions Play Crash Course Physics Traveling Waves 15 questions Play Crash Course Physics Sound 16 questions Play Crash Course Physics The Physics of Music 16 questions Play Crash Course Physics Temperature 15 questions Play Crash Course Physics Kinetic Theory and Phase Changes 17 questions Play Crash Course Physics The Physics of Heat 15 questions Play Crash Course Physics Thermodynamics 15 questions Play Crash Course Physics Engines 15 questions Play Crash Course Physics Electric Charge 16 questions Play Crash Course Physics Electric Fields 15 questions Play Crash Course Physics Voltage, Electric Energy, and Capacitors 16 questions Play Crash Course Physics Electric Current 16 questions Play Crash Course Physics DC Resistors & Batteries 15 questions Play Crash Course Physics Circuit Analysis 12 questions Play Crash Course Physics Capacitors and Kirchhoff 14 questions Play Crash Course Physics Magnetism 15 questions Play Crash Course Physics Ampère's Law 15 questions Play Crash Course Physics Induction - An Introduction 14 questions Play Crash Course Physics How Power Gets to Your Home 14 questions Play Crash Course Physics AC Circuits 15 questions Play Crash Course Physics Maxwell's Equations 15 questions Play Crash Course Physics Geometric Optics 16 questions Play Crash Course Physics Light Is Waves 15 questions Play Crash Course Physics Spectra Interference 15 questions Play Crash Course Physics Optical Instruments 15 questions Play Crash Course Physics Special Relativity 15 questions Play Crash Course Physics Quantum Mechanics - Part 1 14 questions Play Crash Course Physics Quantum Mechanics - Part 2 15 questions Play Crash Course Physics Nuclear Physics 17 questions Play Crash Course Physics Astrophysics and Cosmology 15 questions Play Show all 46

Chemistry

96 practices

Crash Course Chemistry The Nucleus 16 questions Play Crash Course Chemistry Unit Conversion & Significant Figures 16 questions Play Crash Course Chemistry The Creation of Chemistry - The Fundamental Laws 16 questions Play Crash Course Chemistry The Periodic Table 15 questions Play Crash Course Chemistry The Electron 17 questions Play Crash Course Chemistry Stoichiometry - Chemistry for Massive Creatures 15 questions Play Crash Course Chemistry Water & Solutions - for Dirty Laundry 17 questions Play Crash Course Chemistry Acid-Base Reactions in Solution 16 questions Play Crash Course Chemistry Precipitation Reactions 17 questions Play Crash Course Chemistry Redox Reactions 17 questions Play Crash Course Chemistry How to Speak Chemistrian 17 questions Play Crash Course Chemistry The Ideal Gas Law 15 questions Play Crash Course Chemistry Ideal Gas Problems 15 questions Play Crash Course Chemistry Real Gases 15 questions Play Crash Course Chemistry Partial Pressures & Vapor Pressure 15 questions Play Crash Course Chemistry Passing Gases: Effusion, Diffusion, and the Velocity of a Gas 16 questions Play Crash Course Chemistry Energy & Chemistry 15 questions Play Crash Course Chemistry Enthalpy 15 questions Play Crash Course Chemistry Calorimetry 14 questions Play Crash Course Chemistry Entropy: Embrace the Chaos! 15 questions Play Crash Course Chemistry Lab Techniques & Safety 16 questions Play Crash Course Chemistry Atomic Hook-Ups - Types of Chemical Bonds 15 questions Play Crash Course Chemistry Polar & Non-Polar Molecules 16 questions Play Crash Course Chemistry Bonding Models and Lewis Structures 16 questions Play Crash Course Chemistry Orbitals 16 questions Play Crash Course Chemistry Liquids 16 questions Play Crash Course Chemistry Solutions 15 questions Play Crash Course Chemistry Equilibrium 14 questions Play Crash Course Chemistry Equilibrium Equations 12 questions Play Crash Course Chemistry pH and pOH 15 questions Play Crash Course Chemistry Buffers, the Acid Rain Slayer 15 questions Play Crash Course Chemistry Kinetics: Chemistry's Demolition Derby 14 questions Play Crash Course Chemistry Doing Solids 14 questions Play Crash Course Chemistry Network Solids and Carbon 13 questions Play Crash Course Chemistry Silicon - The Internet's Favorite Element 14 questions Play Crash Course Chemistry Electrochemistry 15 questions Play Crash Course Chemistry The History of Atomic Chemistry 14 questions Play Crash Course Chemistry Nuclear Chemistry 14 questions Play Crash Course Chemistry Nuclear Chemistry Part 2 - Fusion and Fission 15 questions Play Crash Course Chemistry Hydrocarbon Power! 15 questions Play Crash Course Chemistry Alkenes & Alkynes 15 questions Play Crash Course Chemistry Aromatics & Cyclic Compounds 15 questions Play Crash Course Chemistry Hydrocarbon Derivatives 13 questions Play Crash Course Chemistry Nomenclature 14 questions Play Crash Course Chemistry Polymers 15 questions Play Crash Course Chemistry The Global Carbon Cycle 14 questions Play Crash Course Organic Chemistry What Is Organic Chemistry? 18 questions Play Crash Course Organic Chemistry The Basics of Organic Nomenclature 19 questions Play Crash Course Organic Chemistry More Organic Nomenclature: Heteroatom Functional Groups 18 questions Play Crash Course Organic Chemistry 3D Structure and Bonding 18 questions Play Crash Course Organic Chemistry IR Spectroscopy and Mass Spectrometry 16 questions Play Crash Course Organic Chemistry Alkanes 18 questions Play Crash Course Organic Chemistry Cyclohexanes 17 questions Play Crash Course Organic Chemistry Stereochemistry 16 questions Play Crash Course Organic Chemistry More Stereochemical Relationships 17 questions Play Crash Course Organic Chemistry Polarity, Resonance, and Electron Pushing 15 questions Play Crash Course Organic Chemistry Acidity 15 questions Play Crash Course Organic Chemistry Nucleophiles and Electrophiles 16 questions Play Crash Course Organic Chemistry Intro to Reaction Mechanisms 16 questions Play Crash Course Organic Chemistry E/Z Alkenes, Electrophilic Addition, & Carbocations 15 questions Play Crash Course Organic Chemistry Thermodynamics and Energy Diagrams 16 questions Play Crash Course Organic Chemistry Alkene Addition Reactions 15 questions Play Crash Course Organic Chemistry Alkene Redox Reactions 15 questions Play Crash Course Organic Chemistry Alkyne Reactions & Tautomerization 15 questions Play Crash Course Organic Chemistry Radical Reactions & Hammond's Postulate 15 questions Play Crash Course Organic Chemistry Intro to Substitution Reactions 16 questions Play Crash Course Organic Chemistry Substitution Reactions - SN1 and SN2 Mechanisms 15 questions Play Crash Course Organic Chemistry E1 and E2 Reactions 16 questions Play Crash Course Organic Chemistry Determining SN1, SN2, E1, and E2 Reactions 15 questions Play Crash Course Organic Chemistry Alcohols, Ethers, and Epoxides 16 questions Play Crash Course Organic Chemistry Synthesis and Column Chromatography 15 questions Play Crash Course Organic Chemistry How to Identify Molecules - Proton NMR 14 questions Play Crash Course Organic Chemistry An Overview of Aldehydes and Ketones 16 questions Play Crash Course Organic Chemistry Organometallic Reagents and Carbanions 15 questions Play Crash Course Organic Chemistry Aldehyde and Ketone Reactions - Hydrates, Acetals, & Imines 16 questions Play Crash Course Organic Chemistry Carboxylic Acids 15 questions Play Crash Course Organic Chemistry Carboxylic Acid Derivatives & Hydrolysis Reactions 15 questions Play Crash Course Organic Chemistry Carboxylic Acid Derivatives - Interconversion & Organometallics 15 questions Play Crash Course Organic Chemistry Chemoselectivity and Protecting Groups 14 questions Play Crash Course Organic Chemistry Retrosynthesis and Liquid-Liquid Extraction 14 questions Play Crash Course Organic Chemistry Polymer Chemistry 15 questions Play Crash Course Organic Chemistry Aromaticity, Hückel's Rule, and Chemical Equivalence in NMR 15 questions Play Crash Course Organic Chemistry Intro to Electrophilic Aromatic Substitution 14 questions Play Crash Course Organic Chemistry More EAS - Electron Donating and Withdrawing Groups 13 questions Play Crash Course Organic Chemistry More EAS & Benzylic Reactions 13 questions Play Crash Course Organic Chemistry Synthesis, Distillation, & Recrystallization 13 questions Play Crash Course Organic Chemistry Conjugation & UV-Vis Spectroscopy 14 questions Play Crash Course Organic Chemistry The Diels-Alder & Other Pericyclic Reactions 14 questions Play Crash Course Organic Chemistry Enols and Enolates - Reactivity, Halogenation, and Alkylation 14 questions Play Crash Course Organic Chemistry The Aldol and Claisen Reactions 13 questions Play Crash Course Organic Chemistry Crossed Aldol Reactions, Enones, and Conjugate Addition 15 questions Play Crash Course Organic Chemistry Amines 14 questions Play Crash Course Organic Chemistry Diazonium Salts & Nucleophilic Aromatic Substitution 14 questions Play Crash Course Organic Chemistry Biochemical Building Blocks & Fischer and Haworth Projections 14 questions Play Crash Course Organic Chemistry Biological Polymers 14 questions Play Crash Course Organic Chemistry Medicinal Chemistry and Penicillin Total Synthesis 15 questions Play Show all 96

Health

10 practices

Crash Course Public Health What is Public Health? 19 questions Play Crash Course Public Health How Your Biology Affects Your Health 20 questions Play Crash Course Public Health How the Environment Affects Your Health 20 questions Play Crash Course Public Health How Society Affects Your Health 17 questions Play Crash Course Public Health Stress is Bad for Your Health 18 questions Play Crash Course Public Health Intro to Epidemiology 19 questions Play Crash Course Public Health Which Healthcare System is Best? 16 questions Play Crash Course Public Health How Laws Affect Your Health 18 questions Play Crash Course Public Health Global Health 19 questions Play Crash Course Public Health The Future of Public Health 17 questions Play Show all 10