Sciences
Mathematics View All
1
Natural number
Fibonacci sequence
Integer in the infinite Fibonacci sequence
Normal distribution
Probability distribution
Standard deviation
Measure of the amount of variation or dispersion of a set of values
Mathematics
Field of study
Prime number
Number whose only smaller divisor is 1
e (mathematical constant)
2.71828..., base of natural logarithms
Bayes' theorem
Probability based on prior knowledge
Pythagorean theorem
Equation relating the side lengths of a right triangle
5
Natural number
Taylor series
Expression of a function as an infinite sum
Fourier transform
Mathematical transform that expresses a function of time as a function of frequency
Roman numerals
Numbers in the Roman numeral system
6
Natural number
Exponential distribution
Probability distribution
Binomial distribution
Probability distribution
Poisson distribution
Discrete probability distribution
Variance
Statistical measure of how far values spread from their average
Golden ratio
Number, approximately 1.618
Gamma function
Extension of the factorial function
Dot product
Algebraic operation returning a single number from two equal-length sequences
Monty Hall problem
Probability puzzle
Game theory
The study of mathematical models of strategic interaction between rational decision-makers
Quadratic formula
Formula that provides the solutions to a quadratic equation
Hyperbolic functions
Mathematical functions for hyperbolas similar to trigonometric functions for circles
Biological and Health Sciences View All
Ketamine
Dissociative anesthetic and anti-depressant
Suicide methods
Means by which a person dies by suicide
Fentanyl
Opioid medication
Human penis
Human male external reproductive organ
COVID-19
Contagious disease caused by SARS-CoV-2
Lymphoma
Hematologic cancer that affects lymphocytes that reside in the lymphatic system and in blood-forming organs
Meningitis
Inflammation of the membranes around the brain and spinal cord
Autism
Neurodevelopmental disorder
Attention deficit hyperactivity disorder
Neurodevelopmental disorder
Borderline personality disorder
Personality disorder characterized by unstable emotions, relationships, and self-image
Asperger syndrome
Neurodevelopmental disorder
Schizophrenia
Mental illness characterized by psychosis
Tuberculosis
Infectious disease
Animal
Kingdom of living things
Vagina
Part of the female reproductive tract
Dengue fever
Tropical disease caused by the dengue virus, transmitted by mosquito
Atherosclerosis
Form of arteriosclerosis
Parkinson's disease
Long-term degenerative neurological disorder
Sepsis
Life-threatening organ dysfunction triggered by infection
Paracetamol
Common medication for pain and fever
Bipolar disorder
Mental disorder that causes periods of depression and abnormally elevated mood
MDMA
Psychoactive drug, often called ecstasy
Multiple sclerosis
Disease that damages the myelin sheaths around nerves
Methamphetamine
Central nervous system stimulant
Clitoris
Female sex organ
Basics and measurement View All
Pound sterling
Unit of account in Anglo-Saxon England
Scientific method
Interplay between observation, experiment and theory in science
International System of Units
Modern form of the metric system
International System of Units
Modern form of the metric system
Millimetre
Unit of length 1/1000 of a metre
Light-year
Unit of length, the distance that light travels in one year; ~10^13 km
Horsepower
Unit of power with different values
Electron
Subatomic particle with negative electric charge (−1)
Natural science
Branch of science about the natural world
Newton (unit)
Unit of force in physics
Celsius
Scale and unit of measurement for temperature
Imperial units
System of units that were implemented on 1 January 1826 in the British Empire
Imperial units
System of units that were implemented on 1 January 1826 in the British Empire
Metre
SI unit of length
Nature
Natural, physical, or material world and its phenomena
Decibel
Logarithmic unit expressing the ratio of a physical quantity
Accuracy and precision
Closeness to true value or to each other
Research
Systematic study undertaken to increase knowledge
Kelvin
SI unit of temperature
Planck units
Units defined only by physical constants
Ampere
SI base unit of electric current
Fahrenheit
Temperature scale
Hertz
SI unit for frequency
Joule
SI unit of energy
Natural environment
All living and non-living things occurring naturally, generally on Earth
Astronomy View All
Kepler's Supernova
Supernova visible from Earth in the 17th century
Earth
Third planet from the Sun
Solar System
The planets and their moons that orbit around the Sun
Sun
Star at the centre of the Solar System
K2-18b
Exoplanet orbiting the red dwarf K2-18
Black hole
Region that has a no-return boundary
Moon
Natural satellite orbiting Earth
Jupiter
Fifth planet from the Sun
Milky Way
Galaxy containing the Solar System
Zodiac
Area of the sky divided into twelve signs
Galaxy
Gravitationally bound astronomical structure
Pluto
Dwarf planet
Saturn
Sixth planet from the Sun
Uranus
Planet
Orion (constellation)
Constellation straddling the celestial equator
Mercury (planet)
First planet from the Sun
Olympus Mons
Martian volcano, tallest point on Mars
Titan (moon)
Largest moon of Saturn
Fermi paradox
Discrepancy of the lack of evidence for alien life despite its apparent likelihood
Dark matter
Hypothetical invisible cosmic material
Ceres (dwarf planet)
Largest asteroid and dwarf planet
Supernova
Star exploding at the end of its stellar evolution
Halley's Comet
Short-period comet visible every 75–77 years
Sagittarius A*
A Supermassive black hole at the center of the Milky Way
Planet Nine
Hypothetical Solar System planet
Chemistry View All
Periodic table
Tabular arrangement of the chemical elements ordered by atomic number
Limonene
Chemical compound
Water
Chemical compound with formula H2O
Aluminium
Chemical element with atomic number 13
Hydrogen peroxide
Chemical compound
Diamond
Allotrope of carbon often used as a gemstone and an abrasive
pH
Measure of the acidity or basicity of an aqueous solution
Mercury (element)
Chemical element with atomic number 80
Sodium hydroxide
Chemical compound with formula NaOH
Carbon dioxide
Chemical compound with formula CO₂
Uranium
Chemical element with atomic number 92
Titanium
Chemical element with atomic number 22
Hydrochloric acid
Strong mineral acid
Acetic acid
Colorless and faint organic acid found in vinegar
Carbon
Chemical element with atomic number 6
Sulfuric acid
Chemical compound
Silver
Chemical element with atomic number 47
Nitrogen
Chemical element with atomic number 7
Lead
Chemical element with atomic number 82
Sulfur
Chemical element with atomic number 16
Nitrous oxide
Colourless non-flammable gas
Sodium
Chemical element with atomic number 11
Alchemy
Branch of natural philosophy
Tungsten
Chemical element with atomic number 74
Chemistry
Scientific discipline
Earth science View All
Continent
Very large landmass identified by convention
Earthquake
Shaking of the surface of the earth caused by a sudden release of energy in the crust
Weather
Short-term state of the atmosphere
Southeast Asia
Subregion of the Asian continent
Tropical cyclone
Rotating storm system with a closed, low-level circulation
Flat Earth
Archaic conception of Earth's shape as a plane or disk
Climate change
Current rise in Earth's average temperature and its effects
Autumn
One of Earth's four temperate seasons
Obsidian
Naturally occurring volcanic glass
Tsunami
Series of water waves caused by the displacement of a large volume of a body of water
Rainbow
Meteorological phenomenon
Big Five personality traits
Personality model consisting of five broad dimensions of personality
Köppen climate classification
Climate classification system
Plate tectonics
Movement of the Earth's lithosphere
Tornado
Violently rotating column of air
Geologic time scale
System that relates geological strata to time
St. Elmo's fire
Weather phenomenon
Asbestos
Carcinogenic fibrous silicate mineral
Quartz
Mineral made of silicon and oxygen.
Aurora (singer)
Norwegian singer (born 1996)
Cretaceous–Paleogene extinction event
Mass extinction event
Limestone
Sedimentary rocks made of calcium carbonate
Light pillar
Atmospheric optical phenomenon in the form of a vertical band of light which appears to extend above and/or below a light source
Atmospheric pressure
Static pressure exerted by the weight of the atmosphere
Pleistocene
First epoch of the Quaternary Period
Physics View All
Schrödinger's cat
Thought experiment devised by the physicist Erwin Schrödinger
Temperature
Physical quantity that expresses hot and cold
Entropy
Property of a thermodynamic system
Newton's laws of motion
Physical laws in classical mechanics
Quantum mechanics
Description of physical properties at the atomic and subatomic scale
Physics
Study of the fundamental properties of matter and energy
Black
Darkest color due to absence or absorption of light
Speed of light
Speed at which all massless particles and associated fields travel in vacuum
Plasma (physics)
One of the four fundamental states of matter
White
Lightest color
Ohm's law
Law according to which the current through a conductor between two points is directly proportional to the voltage across the two points
Viscosity
Resistance of a fluid to shear deformation
Quantum entanglement
Correlation between measurements of quantum subsystems, even when spatially separated
Atom
Smallest unit of a chemical element
Electricity
Physical phenomena associated with the presence and flow of electric charge
String theory
Theoretical framework in physics
Maxwell's equations
Equations describing classical electromagnetism
Speed of sound
Distance travelled during a unit of time by a sound wave propagating through an elastic medium
Higgs boson
Elementary particle involved with rest mass
Uncertainty principle
Foundational principle in quantum physics
Antimatter
Material composed of antiparticles of the corresponding particles of ordinary matter
Schrödinger equation
Linear partial differential equation whose solution describes the quantum-mechanical system.
First law of thermodynamics
Law of thermodynamics distinguishing heat, work, and matter transfers
Electromagnetic radiation
Form of energy emitted and absorbed by particles which are charged which shows wave-like behavior as it travels through space
Bernoulli's principle
Principle relating to fluid dynamics