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- Grade 9 Physics
  - Mechanics
    - Motion 35
    - Kinematics 42
    - Dynamics 19
    - Forces 12
    - Work 2
    - Energy 36
    - Power 5
    - Momentum 17
    - Circular Motion 4
    - Gravitation 7
    - Oscillation 3
    - Equilibrium 1
    - Friction 2
    - Elasticity 1
    - Fluid Statics 4
    - Fluid Dynamics 3
  - Thermodynamics
    - Temperature 3
    - Heat 5
    - Heat Transfer 5
    - Calorimetry 2
    - Kinetic Theory 2
    - Gas Laws 5
    - Entropy 1
    - Heat Engine 2
    - Refrigeration 1
  - Waves & Oscillations
    - Wave Motion 3
    - Wave Types 1
    - Wave Properties 3
    - Sound Waves 18
    - Light Waves 1
    - Interference 2
    - Refraction 2
    - Polarization 2
    - Resonance 2
    - Harmonics 1
    - Doppler Effect 1
  - Optics
    - Optics Refraction 2
    - Optics Dispersion 4
    - Optics Diffraction 2
    - Optics Interference 1
    - Optics Polarization 2
    - Optical Instruments 2
    - Fiber Optics 2
    - Laser 2
    - Vision 2
  - Electricity & Magnetism
    - Electric Charge 1
    - Electric Field 3
    - Electric Potential 1
    - Capacitance 2
    - Current Electricity 4
    - Ohm Law 1
    - Resistivity 2
    - Electric Power 26
    - Magnetic Field 17
    - Alternating Current 1
    - Electromagnetic Waves 12
    - Circuit Theory 15
    - Electrostatics 3
  - Modern Physics
    - Atomic Physics 20
    - Particle Physics 3
    - Wave Mechanics 36
    - X Rays 1
    - Radioactivity 2
  - Nuclear Physics
    - Nuclear Radioactivity 1
    - Nuclear Decay 2
    - Half Life 2
    - Particle Detectors 3
    - Nuclear Applications 1
  - Quantum Physics
    - Wave Function 2
    - Uncertainty 2
    - Quantum States 2
    - Quantum Tunneling 2
    - Quantum Numbers 2
    - Atomic Models 3
    - Photoelectric Effect 1
    - Compton Effect 2
    - Wave Particle 2
    - Spin 2
    - Probability Density 1
  - Astrophysics
    - Stellar Physics 2
    - Astrophysics Black Holes 3
    - Neutron Stars 1
    - Astro Dark Matter 2
    - Cosmic Rays 2
    - Space Exploration 4
    - Planetary Science 5
    - Astro Radio Astronomy 1
    - Gamma Ray Astronomy 1
    - Gravitational Waves 2
  - Fluid Mechanics
    - Fluid Properties 2
    - Fluid Pressure 2
    - Buoyancy 1
    - Fluid Flow 1
    - Continuity Equation 1
    - Bernoulli Principle 1
    - Viscosity 1
    - Surface Tension 2
    - Capillarity 2
    - Turbulence 1
    - Streamline Flow 3
  - Measurement & Units
    - SI Units 1
    - Derived Units 2
    - Unit Conversion 1
    - Significant Figures 1
    - Scientific Notation 1
    - Dimensional Analysis 2
    - Accuracy 1
    - Precision 1
    - Error Analysis 2
    - Measuring Instruments 1
- Grade 9 Chemistry
  - Physical Chemistry
    - States of Matter 26
    - Physical Gas Laws 8
    - Chemical Equilibrium 3
    - Ionic Equilibrium 3
    - Solutions 37
    - Colligative Properties 1
    - Chemical Kinetics 7
    - Electrochemistry 15
    - Physical Quantum Chemistry 1
  - Inorganic Chemistry
    - Periodic Table 67
    - Chemical Bonding 77
    - Coordination Compounds 3
    - Metallurgy 4
    - s Block Elements 12
    - p Block Elements 1
    - Hydrogen 1
    - Halogens 3
    - Noble Gases 3
    - Acids & Bases 39
    - Salt Analysis 5
  - Organic Chemistry
    - Organic Compounds Classification 1
    - Structural Isomerism 2
    - Nomenclature 14
    - Hydrocarbons 7
    - Organic Biomolecules 1
    - Polymers 4
    - Organic Reactions 4
  - Analytical Chemistry
    - Qualitative Analysis 1
    - Separation Techniques 2
  - Biochemistry
    - Biomolecules 11
    - Bio Carbohydrates 5
    - Proteins 7
    - Enzymes 1
    - Lipids 6
    - Metabolism 6
    - Vitamins 3
  - Environmental Chemistry
    - Air Pollution 4
    - Water Pollution 1
    - Waste Management 2
    - Ozone Depletion 1
    - Acid Rain 1
    - Eutrophication 1
    - Toxicology 4
  - Industrial Chemistry
    - Food Chemistry 3
    - Industrial Metallurgy 3
  - Nuclear Chemistry
    - Chemistry Radioactivity 3
    - Chemistry Half Life 1
    - Radioisotopes 1
    - Nuclear Safety 17
  - Theoretical Chemistry
    - Quantum Chemistry 2
    - Molecular Modeling 9
    - Chemical Thermodynamics 8
    - Reaction Dynamics 68
    - Electronic Structure 78
    - Molecular Dynamics 11
  - Materials Chemistry
    - Crystal Structure 1
    - Band Theory 1
    - Nanomaterials 4
    - Biomaterials 1
    - Corrosion 1
    - Alloys 1
- Grade 9 Biology
  - Cell Biology
    - Cell Theory 4
    - Prokaryotic Cells 4
    - Cell Organelles 4
    - Cell Membrane 15
    - Cytoplasm 2
    - Nucleus 2
    - Ribosomes 1
    - Cytoskeleton 1
    - Cell Division 25
    - Cell Cycle 17
    - Transport Mechanisms 23
  - Genetics
    - DNA Structure 1
    - RNA Structure 1
    - Gene Expression 4
    - Biological Genetic Code 1
    - DNA Replication 1
    - Transcription 1
    - Translation 1
    - Mendelian Inheritance 1
    - Genetic Disorders 1
    - Genetic Mapping 1
    - Genetic Engineering 1
    - Genomics 1
  - Evolution
    - Theories of Evolution 1
    - Natural Selection 2
    - Adaptation 1
    - Speciation 1
    - Comparative Anatomy 9
    - Molecular Evidence 1
    - Human Evolution 3
    - Coevolution 1
    - Extinction 1
  - Ecology
    - Ecosystem 4
    - Biomes 2
    - Population Ecology 6
    - Food Chains 3
    - Ecological Energy Flow 1
    - Nutrient Cycles 5
    - Biodiversity 7
    - Ecological Conservation 11
    - Habitat 1
    - Succession 2
    - Human Impact 1
    - Ecological Climate Change 1
  - Human Anatomy & Physiology
    - Skeletal System 47
    - Muscular System 27
    - Nervous System 34
    - Endocrine System 20
    - Circulatory System 38
    - Respiratory System 22
    - Digestive System 11
    - Excretory System 3
    - Reproductive System 67
    - Immune System 5
    - Integumentary System 13
    - Sensory Organs 17
  - Botany Plant Biology
    - Plant Anatomy 6
    - Plant Morphology 1
    - Plant Physiology 29
    - Photosynthesis 23
    - Plant Reproduction 4
    - Plant Growth 1
    - Plant Hormones 1
    - Plant Taxonomy 16
    - Plant Ecology 5
    - Plant Pathology 3
    - Seed Biology 1
    - Plant Genetics 2
    - Plant Adaptations 3
  - Zoology Animal Biology
    - Classification 6
    - Porifera 1
    - Cnidaria 2
    - Platyhelminthes 1
    - Nematoda 4
    - Annelida 1
    - Arthropoda 3
    - Mollusca 1
    - Echinodermata 3
    - Chordata 2
    - Fish 16
    - Amphibians 1
    - Reptiles 2
    - Birds 1
    - Mammals 2
    - Physiology 9
    - Reproduction 11
    - Development 2
    - Behavior 7
  - Microbiology
    - Bacteriology 7
    - Virology 16
    - Mycology 5
    - Parasitology 14
    - Microbial Physiology 1
    - Microbial Ecology 3
    - Pathogenic Microbiology 3
    - Microbial Biotechnology 1
    - Food Microbiology 1
  - Biotechnology
    - Bio Genetic Engineering 1
    - PCR 1
    - Gel Electrophoresis 1
    - DNA Sequencing 1
    - Gene Therapy 1
    - CRISPR 1
    - Stem Cells 4
    - Bioreactors 1
    - GMOs 2
  - Molecular Biology
    - Biological Biomolecules 7
    - Carbohydrates 1
    - Bio Proteins 1
    - Bio Enzymes 13
    - Biochemical Vitamins 3
    - Bio Metabolism 39
    - Cellular Respiration 18
    - Nitrogen Metabolism 1
    - Bio Hormones 18
    - Signal Transduction 1
  - Immunology
    - Adaptive Immunity 1
    - Antigens 1
    - Antibodies 1
    - Lymphatic System 3
    - B Cells 1
    - T Cells 1
    - Immune Response 1
    - Cytokines 1
    - Autoimmunity 1
    - Transplant Immunology 1
    - Tumor Immunology 1
  - Developmental Biology
    - Fertilization 6
    - Cleavage 1
    - Gastrulation 1
    - Organogenesis 2
    - Metamorphosis 1
    - Regeneration 1
- Grade 9 Earth & Space Science
  - Geology
    - Minerals 13
    - Rocks 7
    - Geological Rock Cycle 2
    - Plate Tectonics 22
    - Geological Volcanoes 3
    - Weathering 3
    - Erosion 3
    - Soil 1
    - Fossils 1
    - Geological Time 4
    - Geomorphology 5
    - Natural Resources 1
  - Meteorology
    - Precipitation 2
  - Oceanography
    - Marine Life 12
    - Coral Reefs 1
    - Seafloor Spreading 2
    - Marine Resources 1
    - Climate Impact 1
  - Environmental Geoscience
    - Natural Hazards 2
    - Pollution 2
    - Environmental Impact 1
    - Renewable Energy 1
    - Sustainability 5
    - Conservation 1
  - Paleontology
    - Fossil Types 1
    - Stratigraphy 1
    - Extinction Events 1
    - Evolutionary Trends 1
    - Invertebrate Fossils 1
    - Micropaleontology 2
  - Climate Science
    - Weather 1
    - Atmospheric Circulation 9
    - Ocean Currents 1
    - El Nino 1
    - Greenhouse Effect 1
    - Global Warming 2
    - Climate Change 3
    - Climatorial Carbon Cycle 1
    - Severe Weather 1
    - Paleoclimate 1
  - Hydrology
    - Hydrological Precipitation 1
    - Evaporation 1
    - Runoff 2
    - Groundwater 1
    - River Systems 1
    - Water Management 1
  - Earth Systems & Cycles
    - Biosphere 1
    - Carbon Cycle 1
    - Nitrogen Cycle 1
  - Soil Science
    - Soil Chemistry 1
    - Soil Physics 1
    - Soil Biology 2
- Grade 9 Astronomy
  - Solar System
    - Mercury 1
    - Venus 2
    - Earth 1
    - Dwarf Planets 2
    - Asteroids 2
    - Comets 1
  - Stars & Stellar Evolution
    - Star Formation 1
    - Main Sequence 1
    - White Dwarfs 1
    - Neutron Stars Evolution 1
    - Black Holes 1
    - Supernovae 1
    - Stellar Nucleosynthesis 1
    - Star Clusters 1
  - Galaxies
    - Galaxy Types 1
    - Milky Way 1
    - Andromeda 1
    - Dwarf Galaxies 1
    - Galaxy Star Clusters 1
    - Nebulae 1
    - Quasars 1
    - Galaxy Black Holes 1
    - Dark Matter 1
  - Cosmology
    - Cosmic Inflation 1
    - Cosmo Dark Matter 1
    - Large Scale 1
    - Galaxy Formation 1
    - Universe Expansion 1
  - Space Exploration & Missions
    - Satellites 3
    - Space Telescopes 1
    - Lunar Missions 2
    - Deep Space Missions 1
  - Celestial Mechanics & Orbits
    - Newton Laws 1
    - Precession 1
    - Perturbations 1
    - Orbital Resonance 1
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9th Grade Earth Quizzes , Questions & Answers

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Near Earth Objects: A Quiz To Test Your Knowledge!

Near-Earth objects (NEO) are any small solar system body whose orbit brings it to close to Earth. Most known PHOs and NEOs are asteroids, but a small fraction is comets. The United States, the European Union, and other nations...

Questions: 10 | Attempts: 479 | Last updated: Mar 20, 2025

Sample Question
Which of the following qualifies a solar system body as a NEO?

If its closest approach to the sun is less than 1.3 astronomical units

If its closest approach to the sun is less than 1.7 astronomical units

If its closest approach to the sun is less than 1.5 astronomical units

If its closest approach to the sun is less than 1.4 astronomical units

9th Grade Earth Quizzes , Questions & Answers

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