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Science
- Physics
  - Mechanics
    - Motion 28
    - Kinematics 36
    - Dynamics 1
    - Forces 75
    - Energy 13
    - Power 12
    - Momentum 41
    - Circular Motion 20
    - Gravitation 21
    - Oscillation 3
    - Equilibrium 5
    - Friction 30
    - Elasticity 16
    - Fluid Statics 5
  - Thermodynamics
    - Temperature 14
    - Heat 17
    - Thermal Expansion 7
    - Heat Transfer 65
    - Calorimetry 12
    - Kinetic Theory 42
    - Gas Laws 14
    - First Law 5
    - Second Law 7
    - Entropy 6
    - Heat Engine 2
    - Refrigeration 5
    - Thermodynamic Cycles 4
  - Waves and Oscillations
    - Wave Motion 22
    - Wave Types 16
    - Wave Properties 23
    - Sound Waves 80
    - Light Waves 25
    - Interference 3
    - Diffraction 3
    - Reflection 4
    - Refraction 4
    - Polarization 3
    - Resonance 2
    - Harmonics 10
    - Doppler Effect 5
  - Optics
    - Optics Reflection 32
    - Optics Refraction 3
    - Lenses 17
    - Mirrors 3
    - Optics Dispersion 3
    - Optics Diffraction 4
    - Optics Interference 5
    - Optics Polarization 1
    - Optical Instruments 7
    - Fiber Optics 1
    - Laser 3
    - Vision 5
  - Electricity and Magnetism
    - Electric Charge 28
    - Electric Field 1
    - Electric Potential 13
    - Capacitance 9
    - Current Electricity 22
    - Ohm Law 22
    - Resistivity 27
    - Electric Power 14
    - Magnetic Field 29
    - Electromagnetic Induction 13
    - Alternating Current 5
    - Electromagnetic Waves 31
    - Circuit Theory 33
    - Electrostatics 23
  - Modern Physics
    - Atomic Physics 36
    - Quantum Theory 5
    - Particle Physics 10
    - Wave Mechanics 1
    - Photoelectricity 5
    - X Rays 3
    - Radioactivity 13
    - Spectroscopy 1
  - Nuclear Physics
    - Nuclear Radioactivity 13
    - Nuclear Decay 5
    - Half Life 3
    - Physics Nuclear Reactions 3
    - Fission 2
    - Binding Energy 14
    - Mass Defect 4
    - Nuclear Applications 1
  - Quantum Physics
    - Superposition 2
    - Uncertainty 4
    - Quantum Tunneling 1
    - Quantum Numbers 2
    - Atomic Models 48
    - Photoelectric Effect 7
    - Compton Effect 3
    - Wave Particle 7
    - Quantum Entanglement 1
    - Spin 3
    - Energy Levels 7
    - Probability Density 5
  - Relativity
    - Special Theory 3
    - General Theory 7
    - Time Dilation 1
    - Length Contraction 21
    - Mass Energy 15
    - Relativistic Momentum 1
    - Gravitational Lensing 1
    - Relativity Black Holes 1
  - Astrophysics
    - Stellar Physics 3
    - Astrophysics Black Holes 12
    - Neutron Stars 4
    - Astro Dark Matter 4
    - Cosmic Rays 6
    - Space Exploration 8
    - Planetary Science 11
    - Astro Radio Astronomy 2
    - Gamma Ray Astronomy 1
    - Gravitational Waves 4
  - Fluid Mechanics
    - Fluid Properties 7
    - Fluid Pressure 12
    - Buoyancy 17
    - Continuity Equation 1
    - Bernoulli Principle 8
    - Viscosity 4
    - Surface Tension 10
    - Capillarity 4
    - Turbulence 1
    - Streamline Flow 1
    - Hydraulic Machines 28
  - Measurement and Units
    - SI Units 9
    - Derived Units 7
    - Unit Conversion 10
    - Significant Figures 27
    - Scientific Notation 12
    - Dimensional Analysis 10
    - Accuracy 6
    - Precision 24
    - Error Analysis 22
    - Measuring Instruments 25
- Chemistry
  - Physical Chemistry
    - States of Matter 202
    - Physical Gas Laws 22
    - Chemical Equilibrium 18
    - Ionic Equilibrium 50
    - Solutions 10
    - Colligative Properties 64
    - Chemical Kinetics 18
    - Electrochemistry 11
    - Surface Chemistry 2
    - Physical Quantum Chemistry 1
    - Physical Spectroscopy 5
  - Inorganic Chemistry
    - Periodic Table 230
    - Chemical Bonding 111
    - Coordination Compounds 23
    - Metallurgy 2
    - s Block Elements 1
    - p Block Elements 1
    - d Block Elements 2
    - f Block Elements 5
    - Hydrogen 8
    - Halogens 10
    - Noble Gases 4
    - Acids and Bases 69
    - Salt Analysis 25
  - Organic Chemistry
    - Organic Compounds Classification 28
    - Structural Isomerism 13
    - Nomenclature 82
    - Hydrocarbons 6
    - Haloalkanes 6
    - Alcohols 8
    - Aldehydes 3
    - Ketones 4
    - Carboxylic Acids 8
    - Amines 3
    - Organic Biomolecules 17
    - Organic Reactions 15
  - Analytical Chemistry
    - Qualitative Analysis 4
    - Quantitative Analysis 4
    - Titrations 3
    - Gravimetric Analysis 5
    - Chromatography 4
    - Spectrophotometry 3
    - Electroanalytical Methods 10
    - Mass Spectrometry 5
    - Thermal Analysis 2
    - Separation Techniques 24
  - Biochemistry
    - Biomolecules 7
    - Bio Carbohydrates 22
    - Proteins 30
    - Enzymes 24
    - Lipids 46
    - Nucleic Acids 8
    - Metabolism 4
    - Bioenergetics 1
    - Vitamins 30
    - Hormones 12
    - Cell Signaling 16
    - Genetic Code 3
  - Environmental Chemistry
    - Air Pollution 17
    - Water Pollution 20
    - Soil Pollution 4
    - Waste Management 53
    - Ozone Depletion 9
    - Acid Rain 8
    - Eutrophication 2
    - Toxicology 34
    - Radioactive Pollution 2
  - Industrial Chemistry
    - Cement 3
    - Glass 1
    - Fertilizers 4
    - Dyes 1
    - Paints 1
    - Pharmaceuticals 1
    - Food Chemistry 12
    - Pulp and Paper 2
    - Industrial Metallurgy 2
    - Detergents 5
  - Nuclear Chemistry
    - Chemistry Radioactivity 2
    - Chemistry Nuclear Reactions 2
    - Radioisotopes 8
    - Nuclear Safety 48
  - Polymer Chemistry
    - Polymerization 1
    - Addition Polymers 1
    - Condensation Polymers 1
    - Natural Polymers 1
    - Synthetic Polymers 2
    - Thermoplastics 2
    - Polymer Properties 1
  - Theoretical Chemistry
    - Molecular Modeling 1
    - Computational Chemistry 1
    - Statistical Mechanics 7
    - Chemical Thermodynamics 12
    - Reaction Dynamics 124
    - Electronic Structure 57
    - Molecular Dynamics 18
    - Spectroscopy Theory 1
  - Medicinal Chemistry
    - Pharmacokinetics 7
    - Pharmacodynamics 6
    - Drug Metabolism 3
    - Enzyme Inhibition 18
    - Receptor Binding 9
    - Structure Activity 10
    - Prodrugs 1
    - Natural Products 7
    - Peptidomimetics 1
  - Green Chemistry
    - Principles 8
    - Waste Prevention 7
    - Energy Efficiency 13
    - Catalysis 1
    - Biodegradable Materials 1
    - Green Synthesis 1
    - Solvent Reduction 10
    - Atom Economy 2
    - Life Cycle Analysis 3
    - Pollution Prevention 2
  - Materials Chemistry
    - Crystal Structure 51
    - Band Theory 7
    - Materials Polymers 2
    - Ceramics 1
    - Nanomaterials 8
    - Biomaterials 1
    - Corrosion 28
    - Alloys 11
    - Superconductors 1
    - Thin Films 1
    - Magnetic Materials 4
    - Optical Materials 4
- Biology
  - Cell Biology
    - Cell Theory 100
    - Prokaryotic Cells 17
    - Eukaryotic Cells 25
    - Cell Organelles 63
    - Cell Membrane 70
    - Cell Wall 1
    - Cytoplasm 13
    - Nucleus 12
    - Mitochondria 16
    - Chloroplasts 15
    - Ribosomes 13
    - Endoplasmic Reticulum 2
    - Golgi Apparatus 15
    - Lysosomes 6
    - Cytoskeleton 12
    - Cell Division 113
    - Cell Cycle 37
    - Transport Mechanisms 90
    - Cell Communication 2
  - Genetics
    - DNA Structure 90
    - RNA Structure 36
    - Gene Expression 14
    - Biological Genetic Code 4
    - DNA Replication 36
    - Transcription 8
    - Translation 3
    - Mutation 38
    - Mendelian Inheritance 38
    - Non Mendelian Inheritance 76
    - Genetic Disorders 40
    - Genetic Mapping 3
    - Genetic Engineering 8
    - Genomics 7
    - Epigenetics 3
  - Evolution
    - Origin of Life 47
    - Theories of Evolution 12
    - Natural Selection 42
    - Variation 27
    - Adaptation 23
    - Speciation 9
    - Fossil Record 12
    - Comparative Anatomy 29
    - Molecular Evidence 43
    - Human Evolution 22
    - Coevolution 5
    - Extinction 11
  - Ecology
    - Ecosystem 51
    - Biomes 10
    - Population Ecology 28
    - Community Ecology 10
    - Food Chains 90
    - Food Webs 44
    - Ecological Energy Flow 24
    - Nutrient Cycles 56
    - Biodiversity 180
    - Ecological Conservation 94
    - Habitat 115
    - Succession 24
    - Ecological Adaptation 37
    - Human Impact 33
    - Ecological Climate Change 16
  - Human Anatomy and Physiology
    - Skeletal System 232
    - Muscular System 113
    - Nervous System 259
    - Endocrine System 167
    - Circulatory System 154
    - Respiratory System 82
    - Digestive System 107
    - Excretory System 56
    - Reproductive System 113
    - Immune System 71
    - Integumentary System 35
    - Sensory Organs 191
  - Botany Plant Biology
    - Plant Anatomy 5
    - Plant Morphology 115
    - Plant Physiology 74
    - Photosynthesis 104
    - Plant Reproduction 32
    - Plant Growth 9
    - Plant Hormones 27
    - Plant Taxonomy 91
    - Plant Ecology 31
    - Plant Pathology 10
    - Economic Botany 44
    - Seed Biology 6
    - Plant Genetics 5
    - Plant Adaptations 52
  - Zoology Animal Biology
    - Classification 243
    - Porifera 9
    - Cnidaria 11
    - Platyhelminthes 32
    - Nematoda 17
    - Annelida 16
    - Arthropoda 25
    - Mollusca 15
    - Echinodermata 18
    - Chordata 13
    - Fish 26
    - Amphibians 28
    - Reptiles 41
    - Birds 60
    - Mammals 38
    - Anatomy 17
    - Physiology 17
    - Reproduction 36
    - Development 10
    - Behavior 123
  - Microbiology
    - Microbial Structure 57
    - Bacteriology 6
    - Virology 16
    - Mycology 23
    - Parasitology 43
    - Microbial Genetics 2
    - Microbial Physiology 15
    - Microbial Ecology 27
    - Pathogenic Microbiology 133
    - Microbial Biotechnology 2
    - Food Microbiology 13
    - Industrial Microbiology 1
    - Environmental Microbiology 2
  - Biotechnology
    - Bio Genetic Engineering 4
    - Recombinant DNA 7
    - Cloning 5
    - PCR 7
    - Gel Electrophoresis 21
    - DNA Sequencing 5
    - CRISPR 6
    - Stem Cells 8
    - Bioreactors 3
    - Fermentation 5
    - Bioinformatics 5
    - GMOs 11
    - Proteomics 1
    - Metabolomics 3
  - Molecular Biology
    - Biological Biomolecules 17
    - Carbohydrates 27
    - Biochemical Lipids 2
    - Bio Proteins 12
    - Bio Enzymes 3
    - Bio Nucleic Acids 21
    - Biochemical Vitamins 30
    - Bio Minerals 5
    - Bio Metabolism 45
    - Cellular Respiration 112
    - Nitrogen Metabolism 9
    - Bio Hormones 8
    - Signal Transduction 6
  - Immunology
    - Innate Immunity 16
    - Adaptive Immunity 12
    - Antigens 9
    - Antibodies 7
    - Lymphatic System 19
    - B Cells 25
    - T Cells 6
    - Immune Response 18
    - Cytokines 8
    - Vaccination 8
    - Immunodeficiency 1
    - Hypersensitivity 13
    - Autoimmunity 2
    - Transplant Immunology 2
    - Tumor Immunology 5
  - Developmental Biology
    - Gametogenesis 10
    - Fertilization 39
    - Cleavage 17
    - Organogenesis 24
    - Metamorphosis 13
    - Regeneration 3
    - Growth 14
    - Aging 11
- Earth and Space Science
  - Geology
    - Minerals 52
    - Rocks 18
    - Geological Rock Cycle 45
    - Plate Tectonics 104
    - Geological Volcanoes 33
    - Geological Earthquakes 22
    - Weathering 14
    - Erosion 29
    - Soil 8
    - Fossils 8
    - Geological Time 23
    - Geomorphology 5
    - Natural Resources 25
  - Meteorology
    - Metrological Atmosphere 12
    - Metrological Weather 49
    - Climate 1
    - Clouds 14
    - Precipitation 2
    - Air Pressure 20
    - Wind 4
    - Storms 8
    - Hurricanes 7
    - Metrological Tornadoes 13
    - Weather Forecasting 7
    - Metrological Climate Change 2
  - Oceanography
    - Ocean Basins 18
    - Waves 5
    - Tides 4
    - Currents 5
    - Marine Life 30
    - Coral Reefs 18
    - Seafloor Spreading 8
    - Salinity 7
    - Marine Resources 13
    - Ocean Pollution 9
    - Climate Impact 5
  - Environmental Geoscience
    - Environmental Climate Change 1
    - Natural Hazards 12
    - Pollution 13
    - Environmental Impact 28
    - Resource Management 4
    - Renewable Energy 76
    - Sustainability 41
    - Conservation 35
    - Land Use 5
  - Paleontology
    - Fossilization 5
    - Fossil Types 4
    - Stratigraphy 12
    - Extinction Events 17
    - Evolutionary Trends 16
    - Vertebrate Fossils 12
    - Invertebrate Fossils 7
    - Plant Fossils 3
  - Climate Science
    - Weather 3
    - Climate Zones 3
    - Atmospheric Circulation 2
    - Ocean Currents 4
    - El Nino 12
    - Greenhouse Effect 25
    - Global Warming 14
    - Climate Change 1
    - Climatorial Carbon Cycle 8
    - Water Cycle 3
    - Severe Weather 2
    - Paleoclimate 1
  - Hydrology
    - Hydro Water Cycle 5
    - Hydrological Precipitation 2
    - Evaporation 20
    - Runoff 6
    - Groundwater 4
    - Watersheds 2
    - River Systems 5
    - Lakes 3
    - Wetlands 9
    - Water Quality 24
    - Water Management 21
  - Natural Disasters
    - Earthquakes 5
    - Volcanoes 7
    - Tsunamis 5
    - Floods 2
    - Droughts 1
    - Cyclones 3
    - Tornadoes 3
    - Landslides 2
    - Wildfires 7
    - Heatwaves 1
    - Blizzards 1
  - Earth Systems and Cycles
    - Geosphere 3
    - Hydrosphere 3
    - Atmosphere 11
    - Biosphere 5
    - Rock Cycle 15
    - Earthy Water Cycle 9
    - Carbon Cycle 5
    - Nitrogen Cycle 14
    - Energy Flow 5
    - Climate System 3
  - Soil Science
    - Soil Formation 2
    - Soil Profile 16
    - Soil Properties 4
    - Soil Fertility 13
    - Soil Physics 1
    - Soil Biology 3
    - Soil Erosion 4
    - Soil Conservation 4
- Astronomy
  - Observational Astronomy
    - History of Astronomy 13
    - Ultraviolet Astronomy 2
  - Solar System
    - Sun 3
    - Mercury 7
    - Venus 5
    - Earth 2
    - Moon 21
    - Mars 3
    - Jupiter 2
    - Saturn 13
    - Uranus 5
    - Neptune 7
    - Asteroids 14
    - Comets 10
    - Meteoroids 5
    - Kuiper Belt 2
  - Stars and Stellar Evolution
    - Star Formation 1
    - Main Sequence 10
    - Red Giants 2
    - Black Holes 1
    - Stellar Nucleosynthesis 2
    - Variable Stars 2
  - Galaxies
    - Nebulae 1
    - Quasars 4
    - Galaxy Black Holes 2
  - Cosmology
    - Big Bang 22
    - Cosmo Dark Matter 2
    - Dark Energy 1
    - Cosmic Microwave 3
    - Large Scale 1
    - Galaxy Formation 5
    - Universe Expansion 2
    - Cosmological Models 4
  - Exoplanets
    - Detection Methods 1
    - Planet Types 6
    - Atmospheres 1
  - Astrobiology
    - Biosignatures 4
    - Life Detection 2
    - Mars Life 3
    - Space Missions 5
  - Astronomical Instruments
    - Radio Telescope 1
    - Space Telescope 2
    - Photometer 4
    - Planetarium 1
    - Sextant 4
  - Space Exploration and Missions
    - Spacecraft 1
    - Satellites 3
    - Space Probes 3
    - Space Telescopes 1
    - Manned Missions 2
    - Lunar Missions 6
    - Mars Missions 2
    - Space Stations 2
    - Space Agencies 2
  - Celestial Mechanics and Orbits
    - Orbital Motion 7
    - Kepler Laws 3
    - Newton Laws 60
    - Orbital Gravity 1
    - Eclipses 7
    - Retrograde Motion 2
    - Perturbations 4
    - Orbital Resonance 4
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