Education
Science
- Physics
  - Mechanics
    - Motion 54
    - Kinematics 65
    - Dynamics 36
    - Forces 27
    - Work 5
    - Energy 113
    - Power 6
    - Momentum 20
    - Circular Motion 11
    - Gravitation 9
    - Oscillation 10
    - Equilibrium 6
    - Friction 7
    - Elasticity 5
    - Fluid Statics 5
    - Fluid Dynamics 5
  - Thermodynamics
    - Temperature 6
    - Heat 10
    - Thermal Expansion 5
    - Heat Transfer 22
    - Calorimetry 5
    - Kinetic Theory 4
    - Gas Laws 6
    - First Law 3
    - Second Law 7
    - Entropy 5
    - Heat Engine 5
    - Refrigeration 4
    - Thermodynamic Cycles 1
  - Waves & Oscillations
    - Wave Motion 5
    - Wave Types 5
    - Wave Properties 5
    - Sound Waves 50
    - Light Waves 5
    - Interference 5
    - Diffraction 5
    - Reflection 5
    - Refraction 5
    - Polarization 6
    - Resonance 5
    - Harmonics 5
    - Doppler Effect 5
  - Optics
    - Optics Reflection 5
    - Optics Refraction 4
    - Lenses 5
    - Mirrors 5
    - Optics Dispersion 7
    - Optics Diffraction 5
    - Optics Interference 8
    - Optics Polarization 2
    - Optical Instruments 5
    - Fiber Optics 5
    - Laser 5
    - Vision 5
  - Electricity & Magnetism
    - Electric Charge 5
    - Electric Field 5
    - Electric Potential 5
    - Capacitance 5
    - Current Electricity 9
    - Ohm Law 2
    - Resistivity 5
    - Electric Power 50
    - Magnetic Field 35
    - Electromagnetic Induction 7
    - Alternating Current 5
    - Electromagnetic Waves 17
    - Circuit Theory 18
    - Electrostatics 11
  - Modern Physics
    - Atomic Physics 35
    - Quantum Theory 9
    - Particle Physics 14
    - Wave Mechanics 52
    - Photoelectricity 5
    - X Rays 16
    - Radioactivity 5
    - Spectroscopy 5
  - Nuclear Physics
    - Nuclear Radioactivity 5
    - Nuclear Decay 5
    - Half Life 5
    - Physics Nuclear Reactions 5
    - Fission 4
    - Fusion 5
    - Nuclear Models 5
    - Binding Energy 5
    - Mass Defect 5
    - Particle Detectors 5
    - Nuclear Applications 5
  - Quantum Physics
    - Wave Function 5
    - Superposition 5
    - Uncertainty 5
    - Quantum States 5
    - Quantum Tunneling 5
    - Quantum Numbers 5
    - Atomic Models 5
    - Photoelectric Effect 5
    - Compton Effect 5
    - Wave Particle 5
    - Quantum Entanglement 5
    - Spin 5
    - Energy Levels 5
    - Probability Density 5
  - Relativity
    - Special Theory 6
    - General Theory 5
    - Time Dilation 5
    - Length Contraction 6
    - Mass Energy 4
    - Relativistic Momentum 5
    - Spacetime 5
    - Gravitational Lensing 5
    - Relativity Black Holes 5
  - Astrophysics
    - Stellar Physics 5
    - Astrophysics Black Holes 8
    - Neutron Stars 5
    - Astro Dark Matter 10
    - Cosmic Rays 5
    - Space Exploration 8
    - Planetary Science 16
    - Astro Radio Astronomy 5
    - Gamma Ray Astronomy 5
    - Gravitational Waves 5
  - Fluid Mechanics
    - Fluid Properties 6
    - Fluid Pressure 5
    - Buoyancy 5
    - Fluid Flow 6
    - Continuity Equation 5
    - Bernoulli Principle 5
    - Viscosity 5
    - Surface Tension 5
    - Capillarity 5
    - Turbulence 5
    - Streamline Flow 5
    - Hydraulic Machines 5
    - Aerodynamics 16
  - Measurement & Units
    - SI Units 5
    - Derived Units 5
    - Unit Conversion 8
    - Significant Figures 7
    - Scientific Notation 5
    - Dimensional Analysis 6
    - Accuracy 5
    - Precision 5
    - Error Analysis 4
    - Measuring Instruments 10
- Chemistry
  - Physical Chemistry
    - States of Matter 111
    - Physical Gas Laws 14
    - Chemical Equilibrium 16
    - Ionic Equilibrium 5
    - Solutions 61
    - Colligative Properties 5
    - Chemical Kinetics 22
    - Electrochemistry 22
    - Surface Chemistry 5
    - Physical Quantum Chemistry 5
    - Physical Spectroscopy 5
  - Inorganic Chemistry
    - Periodic Table 99
    - Chemical Bonding 95
    - Coordination Compounds 8
    - Metallurgy 6
    - s Block Elements 12
    - p Block Elements 5
    - d Block Elements 5
    - f Block Elements 5
    - Hydrogen 5
    - Halogens 6
    - Noble Gases 6
    - Acids & Bases 53
    - Salt Analysis 6
  - Organic Chemistry
    - Organic Compounds Classification 6
    - Structural Isomerism 5
    - Nomenclature 15
    - Hydrocarbons 13
    - Haloalkanes 5
    - Alcohols 5
    - Aldehydes 5
    - Ketones 5
    - Carboxylic Acids 5
    - Amines 5
    - Organic Biomolecules 5
    - Polymers 5
    - Organic Reactions 9
  - Analytical Chemistry
    - Qualitative Analysis 5
    - Quantitative Analysis 5
    - Titrations 5
    - Gravimetric Analysis 5
    - Chromatography 5
    - Spectrophotometry 4
    - Electroanalytical Methods 3
    - Mass Spectrometry 5
    - Thermal Analysis 5
    - Separation Techniques 13
  - Biochemistry
    - Biomolecules 14
    - Bio Carbohydrates 14
    - Proteins 25
    - Enzymes 5
    - Lipids 14
    - Nucleic Acids 5
    - Metabolism 40
    - Bioenergetics 7
    - Vitamins 6
    - Hormones 6
    - Cell Signaling 5
    - Genetic Code 5
  - Environmental Chemistry
    - Air Pollution 5
    - Water Pollution 5
    - Soil Pollution 5
    - Waste Management 6
    - Ozone Depletion 5
    - Acid Rain 5
    - Eutrophication 5
    - Toxicology 9
    - Radioactive Pollution 4
  - Industrial Chemistry
    - Petrochemicals 5
    - Industrial Polymers 5
    - Cement 5
    - Glass 5
    - Fertilizers 5
    - Dyes 5
    - Paints 5
    - Pharmaceuticals 6
    - Food Chemistry 9
    - Pulp & Paper 4
    - Industrial Metallurgy 6
    - Industrial Ceramics 5
    - Detergents 5
  - Nuclear Chemistry
    - Chemistry Radioactivity 7
    - Chemistry Nuclear Reactions 5
    - Nuclear Fission 5
    - Nuclear Fusion 4
    - Chemistry Half Life 5
    - Radioisotopes 5
    - Nuclear Energy 5
    - Radiation Detection 5
    - Nuclear Safety 38
  - Polymer Chemistry
    - Polymerization 5
    - Addition Polymers 5
    - Condensation Polymers 5
    - Copolymers 5
    - Biodegradable Polymers 5
    - Natural Polymers 4
    - Synthetic Polymers 5
    - Elastomers 4
    - Thermoplastics 5
    - Thermosetting Polymers 5
    - Polymer Properties 6
    - Polymer Applications 5
  - Theoretical Chemistry
    - Quantum Chemistry 5
    - Molecular Modeling 16
    - Computational Chemistry 5
    - Statistical Mechanics 5
    - Chemical Thermodynamics 47
    - Reaction Dynamics 81
    - Electronic Structure 100
    - Molecular Dynamics 19
    - Spectroscopy Theory 5
  - Medicinal Chemistry
    - Drug Design 4
    - Pharmacokinetics 5
    - Pharmacodynamics 5
    - Drug Metabolism 5
    - Enzyme Inhibition 5
    - Receptor Binding 5
    - Structure Activity 5
    - Prodrugs 5
    - Natural Products 5
    - Peptidomimetics 5
  - Green Chemistry
    - Sustainable Design 4
    - Renewable Resources 4
    - Waste Prevention 5
    - Energy Efficiency 5
    - Catalysis 4
    - Biodegradable Materials 5
    - Green Synthesis 5
    - Solvent Reduction 5
    - Atom Economy 5
    - Life Cycle Analysis 5
    - Pollution Prevention 5
  - Materials Chemistry
    - Crystal Structure 6
    - Band Theory 5
    - Materials Polymers 4
    - Ceramics 5
    - Composites 8
    - Nanomaterials 7
    - Biomaterials 5
    - Corrosion 5
    - Alloys 6
    - Superconductors 5
    - Thin Films 5
    - Magnetic Materials 5
    - Optical Materials 5
- Biology
  - Cell Biology
    - Cell Theory 12
    - Prokaryotic Cells 6
    - Eukaryotic Cells 5
    - Cell Organelles 11
    - Cell Membrane 25
    - Cell Wall 5
    - Cytoplasm 7
    - Nucleus 5
    - Mitochondria 5
    - Chloroplasts 5
    - Ribosomes 5
    - Endoplasmic Reticulum 5
    - Golgi Apparatus 5
    - Lysosomes 5
    - Cytoskeleton 5
    - Cell Division 32
    - Cell Cycle 18
    - Transport Mechanisms 28
    - Cell Communication 5
  - Genetics
    - DNA Structure 5
    - RNA Structure 5
    - Gene Expression 8
    - Biological Genetic Code 5
    - DNA Replication 5
    - Transcription 5
    - Translation 5
    - Mutation 4
    - Mendelian Inheritance 5
    - Non Mendelian Inheritance 5
    - Genetic Disorders 7
    - Genetic Mapping 5
    - Genetic Engineering 5
    - Genomics 5
    - Epigenetics 5
  - Evolution
    - Origin of Life 9
    - Theories of Evolution 5
    - Natural Selection 6
    - Variation 5
    - Adaptation 5
    - Speciation 5
    - Fossil Record 5
    - Comparative Anatomy 12
    - Molecular Evidence 8
    - Human Evolution 5
    - Coevolution 5
    - Extinction 5
  - Ecology
    - Ecosystem 36
    - Biomes 25
    - Population Ecology 12
    - Community Ecology 5
    - Food Chains 16
    - Food Webs 5
    - Ecological Energy Flow 5
    - Nutrient Cycles 13
    - Biodiversity 28
    - Ecological Conservation 47
    - Habitat 5
    - Succession 5
    - Ecological Adaptation 11
    - Human Impact 5
    - Ecological Climate Change 5
  - Human Anatomy & Physiology
    - Skeletal System 116
    - Muscular System 69
    - Nervous System 124
    - Endocrine System 78
    - Circulatory System 90
    - Respiratory System 44
    - Digestive System 46
    - Excretory System 10
    - Reproductive System 120
    - Immune System 11
    - Integumentary System 21
    - Sensory Organs 56
  - Botany Plant Biology
    - Plant Anatomy 38
    - Plant Morphology 5
    - Plant Physiology 69
    - Photosynthesis 53
    - Plant Reproduction 22
    - Plant Growth 5
    - Plant Hormones 5
    - Plant Taxonomy 43
    - Plant Ecology 19
    - Plant Pathology 6
    - Economic Botany 5
    - Seed Biology 5
    - Plant Genetics 6
    - Plant Adaptations 5
  - Zoology Animal Biology
    - Classification 38
    - Porifera 6
    - Cnidaria 6
    - Platyhelminthes 5
    - Nematoda 6
    - Annelida 7
    - Arthropoda 12
    - Mollusca 5
    - Echinodermata 6
    - Chordata 5
    - Fish 76
    - Amphibians 10
    - Reptiles 14
    - Birds 5
    - Mammals 106
    - Anatomy 16
    - Physiology 32
    - Reproduction 26
    - Development 6
    - Behavior 63
  - Microbiology
    - Microbial Structure 5
    - Bacteriology 33
    - Virology 34
    - Mycology 16
    - Parasitology 59
    - Microbial Genetics 5
    - Microbial Physiology 5
    - Microbial Ecology 11
    - Pathogenic Microbiology 18
    - Microbial Biotechnology 5
    - Food Microbiology 5
    - Industrial Microbiology 5
    - Environmental Microbiology 10
  - Biotechnology
    - Bio Genetic Engineering 5
    - Recombinant DNA 5
    - Cloning 5
    - PCR 5
    - Gel Electrophoresis 5
    - DNA Sequencing 5
    - Gene Therapy 5
    - CRISPR 5
    - Stem Cells 5
    - Bioreactors 5
    - Fermentation 5
    - Bioinformatics 6
    - GMOs 5
    - Proteomics 5
    - Metabolomics 5
  - Molecular Biology
    - Biological Biomolecules 8
    - Carbohydrates 6
    - Biochemical Lipids 9
    - Bio Proteins 5
    - Bio Enzymes 21
    - Bio Nucleic Acids 5
    - Biochemical Vitamins 5
    - Bio Minerals 6
    - Bio Metabolism 60
    - Cellular Respiration 22
    - Nitrogen Metabolism 5
    - Bio Hormones 32
    - Signal Transduction 5
  - Immunology
    - Innate Immunity 5
    - Adaptive Immunity 5
    - Antigens 6
    - Antibodies 4
    - Lymphatic System 6
    - B Cells 5
    - T Cells 5
    - Immune Response 3
    - Cytokines 5
    - Vaccination 5
    - Immunodeficiency 5
    - Hypersensitivity 5
    - Autoimmunity 5
    - Transplant Immunology 5
    - Tumor Immunology 5
  - Developmental Biology
    - Gametogenesis 5
    - Fertilization 9
    - Cleavage 6
    - Gastrulation 5
    - Organogenesis 5
    - Metamorphosis 6
    - Regeneration 5
    - Growth 4
    - Aging 5
- Earth & Space Science
  - Geology
    - Minerals 32
    - Rocks 27
    - Geological Rock Cycle 17
    - Plate Tectonics 43
    - Geological Volcanoes 25
    - Geological Earthquakes 5
    - Weathering 16
    - Erosion 11
    - Soil 5
    - Fossils 5
    - Geological Time 6
    - Geomorphology 12
    - Geological Groundwater 5
    - Natural Resources 7
  - Meteorology
    - Metrological Atmosphere 5
    - Metrological Weather 5
    - Climate 5
    - Clouds 5
    - Precipitation 5
    - Air Pressure 5
    - Wind 5
    - Storms 5
    - Hurricanes 5
    - Metrological Tornadoes 5
    - Weather Forecasting 5
    - Metrological Climate Change 5
  - Oceanography
    - Ocean Basins 5
    - Waves 5
    - Tides 5
    - Currents 5
    - Marine Life 47
    - Coral Reefs 5
    - Seafloor Spreading 5
    - Salinity 5
    - Marine Resources 5
    - Ocean Pollution 4
    - Climate Impact 5
  - Environmental Geoscience
    - Environmental Climate Change 5
    - Natural Hazards 8
    - Pollution 8
    - Environmental Impact 5
    - Resource Management 5
    - Renewable Energy 1
    - Sustainability 8
    - Conservation 5
    - Land Use 5
  - Paleontology
    - Fossilization 5
    - Fossil Types 5
    - Stratigraphy 5
    - Extinction Events 5
    - Evolutionary Trends 5
    - Vertebrate Fossils 5
    - Invertebrate Fossils 5
    - Plant Fossils 5
    - Micropaleontology 5
  - Climate Science
    - Weather 5
    - Climate Zones 5
    - Atmospheric Circulation 27
    - Ocean Currents 5
    - El Nino 5
    - Greenhouse Effect 5
    - Global Warming 5
    - Climate Change 9
    - Climatorial Carbon Cycle 5
    - Water Cycle 8
    - Severe Weather 5
    - Paleoclimate 5
  - Hydrology
    - Hydro Water Cycle 5
    - Hydrological Precipitation 5
    - Evaporation 5
    - Infiltration 5
    - Runoff 5
    - Groundwater 5
    - Watersheds 5
    - River Systems 5
    - Lakes 5
    - Wetlands 5
    - Water Quality 7
    - Water Management 7
  - Natural Disasters
    - Earthquakes 5
    - Volcanoes 5
    - Tsunamis 4
    - Floods 5
    - Droughts 5
    - Cyclones 5
    - Tornadoes 5
    - Landslides 5
    - Avalanches 5
    - Wildfires 5
    - Heatwaves 5
    - Blizzards 5
  - Earth Systems & Cycles
    - Geosphere 5
    - Hydrosphere 5
    - Atmosphere 4
    - Biosphere 5
    - Rock Cycle 5
    - Earthy Water Cycle 5
    - Carbon Cycle 5
    - Nitrogen Cycle 5
    - Energy Flow 5
    - Climate System 5
  - Soil Science
    - Soil Formation 5
    - Soil Profile 5
    - Soil Properties 5
    - Soil Classification 5
    - Soil Fertility 5
    - Soil Chemistry 5
    - Soil Physics 5
    - Soil Biology 5
    - Soil Erosion 5
    - Soil Conservation 5
  - Aerospace
    - Atmospheric Science 5
- Astronomy
  - Observational Astronomy
    - History of Astronomy 5
    - Telescopes 5
    - Optical Astronomy 5
    - Radio Astronomy 5
    - Infrared Astronomy 5
    - Ultraviolet Astronomy 5
    - X ray Astronomy 5
    - Astro Gamma Ray 5
    - Astronomical Spectroscopy 5
    - Photometry 5
    - Astrometry 5
  - Solar System
    - Sun 5
    - Mercury 5
    - Venus 5
    - Earth 5
    - Moon 14
    - Mars 5
    - Jupiter 5
    - Saturn 5
    - Uranus 5
    - Neptune 5
    - Dwarf Planets 5
    - Asteroids 8
    - Comets 5
    - Meteoroids 5
    - Kuiper Belt 5
    - Oort Cloud 5
  - Stars & Stellar Evolution
    - Star Formation 5
    - Main Sequence 5
    - Red Giants 5
    - White Dwarfs 5
    - Neutron Stars Evolution 5
    - Black Holes 5
    - Supernovae 5
    - Stellar Nucleosynthesis 5
    - Star Clusters 5
    - Variable Stars 5
  - Galaxies
    - Galaxy Types 5
    - Milky Way 5
    - Andromeda 5
    - Dwarf Galaxies 5
    - Galaxy Star Clusters 5
    - Nebulae 5
    - Active Galaxies 5
    - Quasars 5
    - Galaxy Black Holes 5
    - Dark Matter 5
  - Cosmology
    - Big Bang 5
    - Cosmic Inflation 5
    - Cosmo Dark Matter 5
    - Dark Energy 5
    - Cosmic Microwave 5
    - Large Scale 5
    - Galaxy Formation 5
    - Universe Expansion 5
    - Multiverse 5
    - Cosmological Models 5
  - Exoplanets
    - Detection Methods 5
    - Transit Method 4
    - Radial Velocity 6
    - Direct Imaging 4
    - Microlensing 5
    - Planet Types 5
    - Habitable Zone 5
    - Atmospheres 4
    - Orbital Properties 5
    - Notable Exoplanets 5
  - Astrobiology
    - Extremophiles 5
    - Habitable Zones 5
    - Exoplanet Life 5
    - Biosignatures 5
    - Life Detection 5
    - Mars Life 5
    - Space Missions 5
  - Astronomical Instruments
    - Optical Telescope 5
    - Radio Telescope 5
    - Space Telescope 5
    - Spectrograph 5
    - Photometer 5
    - Interferometer 5
    - CCD Camera 5
    - Planetarium 5
    - Astrolabe 5
    - Sextant 5
  - Space Exploration & Missions
    - Spacecraft 5
    - Satellites 5
    - Space Probes 5
    - Space Telescopes 5
    - Manned Missions 5
    - Lunar Missions 5
    - Mars Missions 5
    - Deep Space Missions 5
    - Space Stations 5
    - Space Agencies 6
  - Celestial Mechanics & Orbits
    - Orbital Motion 6
    - Kepler Laws 5
    - Newton Laws 5
    - Orbital Gravity 5
    - Eclipses 6
    - Precession 5
    - Retrograde Motion 5
    - Perturbations 5
    - Orbital Resonance 5
Math
English
History
Geography
Computer Science
Civics
Economics
Exams & Certifications

9th Grade Mechanics Quizzes, Questions & Answers

Recent Mechanics Quizzes

Are You Ready To Take The Physics Midterm Exam Test?

Questions: 19 | Attempts: 1332 | Last updated: Oct 21, 2025

Sample Question
Which of Newton's laws best explains why motorists should buckle-up?

First law

Second law

Third law

Law of Universal Gravitation

Are You As Smart As Isaac Newton? Quiz

Questions: 10 | Attempts: 3841 | Last updated: Mar 21, 2025

Sample Question
What helped Newton develop his theory of color?

A fallen apple.

A star in the sky.

A reflecting telescope.

Salty water.

Physical Science Unit 5 Review

Questions: 10 | Attempts: 216 | Last updated: May 8, 2025

Sample Question
A 250N force moves a box 2.0m. How much Work was done?

500J

125J

500cal

125cal

Work, Power and Machines Trivia Quiz!

Questions: 20 | Attempts: 276 | Last updated: Mar 20, 2025

Sample Question
Kinetic and potential energy increase when you lift something in the air.

True

False

8th Science Benchmark Hms 2015-16 Final

Questions: 51 | Attempts: 318 | Last updated: May 8, 2025

Sample Question

Option D

Option A

Option B

Option C

Grile Materiale

Questions: 205 | Attempts: 2922 | Last updated: Mar 21, 2025

Sample Question
1. Cantitatea de substanţă existentă într-un corp determina:

A) masa corpului;

B) greutatea corpului;

C) volumul real al corpului;

D) volumul aparent al corpului;

E) volumul în grămadă.

Preap Physics Final Exam

Questions: 34 | Attempts: 209 | Last updated: Mar 21, 2025

Sample Question
Which of the following situations represents a positive displacement of a carton? Assume positive position is measured vertically upward along a y-axis.

A. A delivery person waiting for an elevator lowers a carton onto a dolly.

B. When the elevator doors open, the delivery person lifts the dolly over the threshold of the elevator.

C. The delivery person pushes the dolly to the back of the elevator while pressing a floor button.

D. The door closes and the elevator moves from the 10th to the 4th floors.

Exam 3 Physics Numbers 21-25

Questions: 5 | Attempts: 59 | Last updated: Jun 2, 2025

Sample Question
21. Which are simultaneous equal but opposite forces resulting from the interaction of two objects?

A. net external forces

B. gravitational forces

C. field forces

D. action-reaction pairs

Exam 4 Preap Physics Numbers 1-5

Questions: 5 | Attempts: 187 | Last updated: Mar 20, 2025

Sample Question
1.Which of the following sentences uses work in the scientific sense?

A. Stan goes to work on the bus.

B. Anne did work on the project for 5 hours.

C. Joseph found that holding the banner in place was hard work.

D. An engine does work on a car when the car is moving.

Exam 3 Target 8 Retake Preap

Questions: 5 | Attempts: 63 | Last updated: Jun 19, 2025

Sample Question
The mass of a bowling ball is 3 times the mass of a bowling pin. When the ball collides with the pin, it exerts a force of 24 N on the pin. What is the reaction force the pin exerts on the ball?

A. 72 N

B. 24 N

C. 8.0 N

D. 6.0 N

« Previous 1 234 5 6 7 8 9...10 Next »