Describe & Guess for School Students
Converts electrical energy into light — Bulb
Measures body temperature — Thermometer
Used to observe distant objects in space — Telescope
Shows direction using Earth’s magnetism — Compass
Device that stores and processes data — Computer
Converts sound waves into electrical signals — Microphone
Produces electricity from fuel — Generator
Used to measure weight — Weighing scale
Helps view tiny organisms — Microscope
Converts AC to DC power — Adapter
Protects a building from lightning — Lightning rod
Stores electrical charge — Battery
Measures atmospheric pressure — Barometer
Measures speed of vehicles — Speedometer
Measures earthquakes — Seismograph
Measures time precisely in labs — Stopwatch
Helps pilots navigate aircraft — Radar
Converts solar energy to electricity — Solar panel
Prevents electrical overload — Fuse
Amplifies sound — Loudspeaker
Animal adapted to desert with water storage — Camel
Mammal that can fly — Bat
Cold-blooded reptile living in water and land — Crocodile
Bird known for migration over long distances — Arctic tern
Fastest land animal — Cheetah
Animal with protective quills — Porcupine
Marine mammal using echolocation — Dolphin
Largest land animal — Elephant
Only bird that can fly backward — Hummingbird
Nocturnal bird with sharp vision — Owl
Process of plants making food — Photosynthesis
Change from liquid to gas — Evaporation
Gas essential for breathing — Oxygen
Force pulling objects toward Earth — Gravity
Change of solid directly to gas — Sublimation
Movement of water through soil — Percolation
Process of plants losing water vapor — Transpiration
Energy stored in food — Chemical energy
Heat transfer without medium — Radiation
Study of earthquakes — Seismology
Written plan before building construction — Blueprint
Official record of financial transactions — Ledger
Person who designs buildings — Architect
Study of past human life — Archaeology
System of government by the people — Democracy
Removal of forest cover — Deforestation
Protection of natural resources — Conservation
Study of weather — Meteorology
Buying and selling of goods — Trade
Movement of people to cities — Urbanization
Device used to detect lies — Polygraph
Machine that scans internal body structures — MRI scanner
Satellite used for communication — Communication satellite
Device that records heart activity — ECG machine
Technology storing data in “cloud” — Cloud computing
Vehicle exploring Mars — Rover
System identifying fingerprints — Biometric system
Artificial intelligence that learns from data — Machine learning
Device used for digital payments — POS machine
Online storage service — Cloud drive
Sport played on ice with sticks — Ice hockey
Race covering 42.195 km — Marathon
Game using racket and shuttle — Badminton
Sport combining swimming, cycling, running — Triathlon
Indoor board game of strategy — Chess
Bat-and-ball sport with innings — Cricket
Sport using cue and balls on table — Billiards
Game played on court with net and ball — Volleyball
Sport where players dribble and shoot hoops — Basketball
Activity involving climbing natural rock — Rock climbing
Structure carrying vehicles over water — Bridge
Underground railway system — Metro
Tallest type of building for offices — Skyscraper
Large water storage structure — Dam
Road crossing over another road — Flyover
Path for airplanes to land — Runway
Facility for launching spacecraft — Spaceport
Controlled traffic crossing — Signal junction
Circular road intersection — Roundabout
Underground water channel — Tunnel
Device storing digital photos — Memory card
Sends emails and accesses internet — Laptop
Small wearable fitness tracker — Smartwatch
Records moving images — Video camera
Software used for presentations — PowerPoint
Tool for editing images — Photoshop
Program protecting from viruses — Antivirus
Online meeting platform — Zoom
Website search tool — Search engine
Digital book format — E-book
Symbol representing a country — National flag
Written law of a nation — Constitution
Person representing a country abroad — Ambassador
Election where citizens vote — General election
Tax added to goods and services — GST
Official population count — Census
Agreement between countries — Treaty
System of ruling by a king/queen — Monarchy
Group of ministers advising leader — Cabinet
Place where laws are made — Parliament
Describe & Guess for School Students
Physics & Chemistry
Resistance to change in motion — Inertia
Unit of electric current — Ampere
Force per unit area — Pressure
Energy due to motion — Kinetic energy
Energy stored due to position — Potential energy
Bending of light in a new medium — Refraction
Splitting of white light into colors — Dispersion
Device converting mechanical to electrical energy — Generator
Substance that speeds reactions — Catalyst
Smallest unit of an element — Atom
Combination of atoms — Molecule
Loss of electrons in reaction — Oxidation
Gain of electrons — Reduction
Substance with pH less than 7 — Acid
Substance neutralizing acid — Base
Pure substance of one type of atom — Element
Mixing without chemical change — Physical change
Burning in presence of oxygen — Combustion
Heat transfer through contact — Conduction
Heat transfer by fluid movement — Convection
Describe & Guess for School Students
Biology
Basic unit of life — Cell
Plant tissue for transport of water — Xylem
Tissue carrying food in plants — Phloem
Process of cell division — Mitosis
Transfer of pollen to stigma — Pollination
Male reproductive cell — Sperm
Female reproductive cell — Ovum
Green pigment in plants — Chlorophyll
Process of breathing in oxygen — Respiration
Study of living organisms — Biology
Warm-blooded animals — Mammals
Backbone animals — Vertebrates
Disease caused by virus — Viral infection
Body defense mechanism — Immunity
Breakdown of food in body — Digestion
Organ pumping blood — Heart
Liquid part of blood — Plasma
Organ filtering blood — Kidney
Process of growing plants from seeds — Germination
Study of heredity — Genetics
Geography & Environment
Layer of air around Earth — Atmosphere
Large landmass — Continent
Water covering most Earth surface — Ocean
Sudden shaking of Earth — Earthquake
Molten rock below Earth — Magma
Molten rock outside Earth — Lava
Cutting down forests — Deforestation
Protection of environment — Conservation
Increase in Earth’s temperature — Global warming
Gas trapping heat — Greenhouse gas
Movement of people across regions — Migration
Line dividing Earth into halves — Equator
Imaginary north-south lines — Longitude
Imaginary east-west lines — Latitude
Natural home of organisms — Habitat
Variety of living organisms — Biodiversity
Farming without chemicals — Organic farming
Wind energy device — Wind turbine
Water storage underground — Aquifer
Soil removal by water/wind — Erosion
Describe & Guess for School Students
Civics & Economics
Government rule by elected people — Democracy
System ruled by a king — Monarchy
Rule by a small powerful group — Oligarchy
Written rules of a country — Constitution
Law-making body — Legislature
Head of state in India — President
Head of government in India — Prime Minister
Taxes on goods/services — GST
Buying and selling system — Market economy
Rise in prices over time — Inflation
People without jobs — Unemployment
Income difference in society — Economic inequality
Money deposited in banks — Savings
Borrowed money to repay — Loan
Financial plan of government — Budget
Exchange of goods — Trade
Selling to other countries — Export
Buying from other countries — Import
Use of machines replacing humans — Automation
Digital payment method — UPI
History & Culture
Study of past events — History
Period before written records — Prehistory
Oldest Indian civilization — Indus Valley Civilization
System dividing society into groups — Caste system
Journey for religious purpose — Pilgrimage
Movement for India’s freedom — Independence movement
Non-violent protest — Satyagraha
Policy of not taking sides — Non-alignment
Period of British rule in India — Colonial rule
Handwritten ancient text — Manuscript
Technology & Modern World
Artificial human intelligence system — AI
Network connecting computers worldwide — Internet
Protection of digital data — Cybersecurity
Crime using computers — Cybercrime
Currency in digital form — Cryptocurrency
Learning through internet — Online education
Storing data on remote servers — Cloud storage
Self-driving vehicle technology — Autonomous driving
Robot performing human tasks — Automation robot
Study of space and universe — Astronomy
Describe & Guess for School Students
Physics (Conceptual & Analytical)
Tendency of a body to resist change in its state — Inertia
Rate of change of momentum — Force
Work done per unit time — Power
Product of mass and velocity — Momentum
Energy stored in a stretched spring — Elastic potential energy
Bending of light due to density change — Refraction
Returning of light to same medium — Reflection
Change in wave direction around obstacles — Diffraction
Overlapping of waves producing patterns — Interference
Apparent change in frequency due to motion — Doppler effect
Property opposing electric current — Resistance
Ratio of voltage to current — Resistance (Ohm’s law relation)
Closed conducting path for current — Electric circuit
Device storing electric charge — Capacitor
Energy stored in moving charges — Electrical energy
Force between electric charges — Electrostatic force
Magnetic field around current-carrying wire — Electromagnetism
Conversion of AC to DC — Rectification
Energy transformation in turbine — Mechanical to electrical
Force acting toward Earth’s center — Gravitational force
Chemistry (High-level reasoning)
Substance increasing reaction rate without consumption — Catalyst
Electron loss during reaction — Oxidation
Electron gain during reaction — Reduction
Reaction releasing heat — Exothermic reaction
Reaction absorbing heat — Endothermic reaction
Substance donating H⁺ ions — Acid
Substance accepting H⁺ ions — Base
Neutral substance in solution — Salt
Substance resisting pH change — Buffer solution
Arrangement of elements by atomic number — Periodic table
Outermost electron shell — Valence shell
Bond by electron sharing — Covalent bond
Bond by electron transfer — Ionic bond
Attraction between molecules — Intermolecular forces
Energy required to remove electron — Ionization energy
Reaction forming insoluble solid — Precipitation reaction
Law of constant mass in reactions — Law of conservation of mass
Reaction reversing under conditions — Reversible reaction
Equal rate forward and backward reaction — Chemical equilibrium
Substance dissolving another — Solvent
Describe & Guess for School Students
Biology (Olympiad depth)
Structural and functional unit of life — Cell
Control center of cell — Nucleus
Site of protein synthesis — Ribosome
Powerhouse of cell — Mitochondria
Fluid matrix inside cell — Cytoplasm
Selectively permeable cell boundary — Cell membrane
Cell division forming identical cells — Mitosis
Division producing gametes — Meiosis
Transfer of genetic traits — Heredity
Study of genes — Genetics
Conversion of light into food — Photosynthesis
Breakdown of glucose for energy — Respiration
Transport of water in plants — Xylem
Transport of food in plants — Phloem
Loss of water vapor through leaves — Transpiration
Maintenance of internal balance — Homeostasis
Defense against pathogens — Immunity
Organism feeding on dead matter — Saprophyte
Organism depending on host — Parasite
Interaction where both benefit — Mutualism
Describe & Guess for School Students
Geography & Environment (Analytical)
Layer protecting Earth from UV rays — Ozone layer
Gradual increase in Earth’s temperature — Global warming
Gas trapping infrared radiation — Greenhouse gas
Sudden Earth surface shaking — Earthquake
Molten rock beneath crust — Magma
Eruption of molten material — Volcano
Fertile river-deposited land — Alluvial soil
Large rotating air mass — Cyclone
Movement of Earth around Sun — Revolution
Tilting motion on its axis — Rotation
Natural region supporting organisms — Ecosystem
Interconnected food relationships — Food web
Loss of fertile soil layer — Soil erosion
Underground water storage — Aquifer
Renewable energy from sunlight — Solar energy
Renewable energy from moving air — Wind energy
Natural vegetation of a region — Biome
Species dying permanently — Extinction
Protection of biodiversity — Conservation
Study of Earth’s physical features — Geomorphology
Describe & Guess for School Students
Civics, Economics & Society (Reasoning level)
Rule by elected representatives — Democracy
Power division among government levels — Federalism
Written legal framework of nation — Constitution
Law-making body — Legislature
Implementation of laws — Executive
Interpretation of laws — Judiciary
System based on supply–demand — Market economy
Rise in overall price level — Inflation
Lack of employment opportunities — Unemployment
Gap between rich and poor — Economic inequality
Production of goods in large scale — Industrialization
Movement from villages to cities — Urbanization
Money deposited in financial institutions — Savings
Borrowed capital with repayment — Loan
Exchange of goods internationally — Trade
Government financial planning — Budget
Goods sent abroad — Export
Goods brought from abroad — Import
Digital financial transaction system — UPI
Study of resource allocation — Economics