General Science
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One-Liners
Study MaterialOne-Liners – General Science
General Science One-Liners help candidates quickly revise important scientific facts, discoveries, inventions, formulas, human body systems, and space science topics for competitive examinations.
These one-liner science facts are highly useful for SSC, Railway, Banking, UPSC, Defence, State PSC, Insurance, and various government exams.
Physics One-Liners
- SI unit of Force → Newton
- SI unit of Power → Watt
- SI unit of Energy → Joule
- Speed of light → 3 × 108 m/s
- Sound cannot travel through → Vacuum
- Device used to measure current → Ammeter
- Device used to measure voltage → Voltmeter
- Mirror used in vehicles → Convex Mirror
- Instrument used to measure pressure → Barometer
- Unit of electric current → Ampere
Chemistry One-Liners
- Chemical formula of water → H2O
- Chemical formula of carbon dioxide → CO2
- pH value of pure water → 7
- Most abundant gas in atmosphere → Nitrogen
- Gas essential for respiration → Oxygen
- Common salt chemical name → Sodium Chloride
- LPG mainly contains → Butane
- Marsh gas → Methane
- Acid present in lemon → Citric Acid
- Acid present in curd → Lactic Acid
Biology One-Liners
- Largest organ in human body → Skin
- Largest internal organ → Liver
- Largest bone in human body → Femur
- Smallest bone in human body → Stapes
- Blood purification organ → Kidney
- Father of Biology → Aristotle
- Father of Genetics → Gregor Mendel
- Normal human body temperature → 37°C
- Human body contains → 206 bones
- Insulin is produced by → Pancreas
Human Body One-Liners
- Heart has → Four Chambers
- Normal heart beat rate → 72 beats/minute
- Universal blood donor → O Negative
- Universal blood recipient → AB Positive
- Vitamin D deficiency causes → Rickets
- Vitamin C deficiency causes → Scurvy
- Vitamin B deficiency causes → Beriberi
- Red blood cells are produced in → Bone Marrow
- Largest gland in human body → Liver
- Blood group discovered by → Karl Landsteiner
Environmental Science One-Liners
- Greenhouse gas mainly responsible for global warming → Carbon Dioxide
- Ozone layer protects from → Ultraviolet Rays
- Chipko Movement is related to → Forest Conservation
- World Environment Day → 5 June
- Earth Day → 22 April
- Main cause of acid rain → Sulphur Dioxide
- Largest source of air pollution → Fossil Fuels
Space Science One-Liners
- Nearest planet to Sun → Mercury
- Largest planet in Solar System → Jupiter
- Red Planet → Mars
- Earth’s natural satellite → Moon
- Planet known for rings → Saturn
- First man on Moon → Neil Armstrong
- First Indian in Space → Rakesh Sharma
- ISRO Headquarters → Bengaluru
- India’s Moon Mission → Chandrayaan
- India’s Mars Mission → Mangalyaan
Scientific Instruments One-Liners
- Barometer → Measures atmospheric pressure
- Hydrometer → Measures density of liquids
- Seismograph → Measures earthquakes
- Microscope → Magnifies tiny objects
- Telescope → Observes distant objects
- Speedometer → Measures speed
- Lactometer → Measures purity of milk
Important Discoveries One-Liners
| Scientist | Discovery |
|---|---|
| Isaac Newton | Law of Gravitation |
| Alexander Fleming | Penicillin |
| Thomas Edison | Electric Bulb |
| C. V. Raman | Raman Effect |
| Marie Curie | Radioactivity |
| Gregor Mendel | Genetics |
Most Repeated Topics in Exams
| Topic | Importance |
|---|---|
| Human Body & Diseases | Very High |
| Physics Units & Laws | High |
| Chemical Formulas | High |
| Space Science | High |
| Scientific Instruments | Moderate |
| Environmental Science | High |
Quick Revision Framework
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Final Takeaway
General Science One-Liners help candidates revise scientific concepts, discoveries, inventions, formulas, and human body facts quickly and effectively for competitive examinations.
Regular practice and revision of science one-liners improve memory retention, analytical understanding, and question-solving speed in exams.