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Welcome to Science Reader!
Glossary Term
Joule-Thomson Effect: Why Most Gases Cool on Expansion
The Joule-Thomson effect is the temperature change when a real gas expands through a valve at constant enthalpy, with no heat exchange.
Zymogen Activation: How Inactive Enzymes Power Digestion
Zymogen activation is the conversion of an inactive enzyme precursor into its active form through proteolytic cleavage, ensuring digestive enzymes activate only at...
Mitochondrial Eve: The Maternal Ancestor of All Living Humans
Mitochondrial Eve is the most recent woman from whom all living humans inherited their mitochondrial DNA through an unbroken maternal line, a statistical...
Vortex Shedding: How Fluid Flow Creates Oscillating Forces
Vortex shedding is the periodic release of alternating vortices from a bluff body in fluid flow, producing oscillating forces in the body's wake.
Trophic Cascade: How Predators Shape Entire Ecosystems
A trophic cascade ripples through a food web when predators suppress prey, releasing lower trophic levels from grazing pressure.
Kinetic Molecular Theory: How Moving Molecules Explain Gases
Kinetic molecular theory explains gas behavior as the result of constant, random molecular motion whose collisions produce pressure and temperature.
Sickle Cell Trait Evolution: How One Mutation Defends Against Malaria
Sickle cell trait evolution is the persistence of a hemoglobin mutation in human populations because carriers gain partial protection against malaria, the deadliest...
Prime Numbers: Definition, Properties, and Why They Matter
A prime number is a natural number greater than 1 whose only factors are 1 and itself. Primes are the atoms of arithmetic.
Yellow Dwarf Stars: Traits, Lifespan, and Habitability
Yellow dwarf stars are G-type main-sequence stars with surface temperatures of 5,200 to 6,000 K. The Sun is the best-known example.
Lichtenberg Figures: From Lightning Scars to Laser Printers
Lichtenberg figures are branching, tree-like shapes produced when high-voltage electrical discharges spread across or through an insulating material.
