Chemistry
Chemistry studies matter, its composition, properties, transformations, and the atomic and molecular interactions behind everyday materials and reactions.
Category
Science Topics
Browse Qlopedia topics grouped under Science.
298 topics, showing 265-288 on page 12 of 13.
Topics
Statistical mechanics
Statistical mechanics explains macroscopic thermodynamics by using probability to describe the microscopic behavior of particles and energy.
Heat transfer
Heat transfer is the movement of thermal energy caused by temperature differences, through conduction, convection, radiation, or combinations of all three.
Entropy
Entropy is a measure connected to energy dispersal, microscopic possibilities, irreversibility, and uncertainty in physical and information systems.
Thermodynamics
Thermodynamics studies heat, work, temperature, entropy, and energy transfer in physical systems, from engines to stars to living cells.
Astrolabe
An astrolabe is a portable astronomical instrument that turns the sky into a working diagram. For centuries it helped people find time, track the Sun and stars, teach astronomy, survey heights, and navigate by celestial positions.
Scopus
Scopus is a popular scholarly database website and Elsevier product for finding abstracts, citation data, author profiles, metrics, and research literature across disciplines.
EndNote
EndNote is a popular reference management website and software product for saving references, organizing research libraries, formatting citations, and building bibliographies.
Crossref
Crossref is a popular scholarly infrastructure website and membership organization that helps register DOIs, connect research metadata, and make scholarly works easier to find and cite.
Mendeley
Mendeley is a popular research tool website and reference-management platform for organizing papers, managing citations, searching literature, and writing with citation support.
ORCID
ORCID is a popular research identity website that provides persistent identifiers for researchers and helps connect people with their publications, grants, affiliations, peer review, and other scholarly contributions.
Zotero
Zotero is a popular research tool website and reference manager for collecting sources, organizing libraries, citing research, sharing groups, and syncing bibliographic work across devices.
Semantic Scholar
Semantic Scholar is a popular AI-powered research discovery website for finding scholarly papers, exploring citation context, tracking authors, and using academic graph data through APIs.
Figshare
Figshare is a popular research repository website and infrastructure service for sharing, managing, citing, and reporting research outputs such as datasets, figures, posters, code, and files.
arXiv
arXiv is a popular open-access e-print archive where researchers share preprints and scholarly papers in fields such as physics, mathematics, computer science, statistics, and quantitative biology.
Light pollution
Light pollution is excessive, misdirected, or poorly timed artificial light at night. It can brighten the night sky, create glare, disrupt sleep and wildlife, waste energy, and make it harder to see stars, while better lighting design can reduce many of its effects.
Vaccines
Vaccines train the immune system to recognize a pathogen or toxin before a dangerous infection occurs, reducing the risk of severe disease, complications, transmission, and outbreaks across individuals and communities.
Space
Space is the vast physical realm beyond Earth?s atmosphere, containing planets, moons, asteroids, comets, stars, galaxies, radiation, dust, magnetic fields, dark matter, and the expanding universe itself. Studying space helps explain where Earth came from, how cosmic structures form, how technology works in orbit, and why our planet is both ordinary and precious.
Renewable energy
Renewable energy comes from naturally replenished resources such as sunlight, wind, flowing water, geothermal heat, and sustainable biomass, helping power electricity, heat, transport, and industry while reducing dependence on fossil fuels.
Radioactivity
Radioactivity is the spontaneous decay of unstable atomic nuclei, releasing particles or energy as atoms transform toward more stable forms, with uses in medicine, dating, energy, industry, research, and radiation protection.
Quantum physics
Quantum physics studies matter, energy, particles, and fields at scales where classical intuition breaks down. It explains why atoms are stable, why light can arrive in packets, why outcomes are often probabilistic, and why modern tools such as lasers, transistors, atomic clocks, MRI, and quantum computers are possible.
Plate tectonics
Plate tectonics is the theory that Earth's rigid outer shell is broken into moving plates whose boundaries create many earthquakes, volcanoes, mountain ranges, trenches, mid-ocean ridges, and long-term changes in continents and ocean basins.
The periodic table
The periodic table is the organized chart of chemical elements, arranged mainly by atomic number so that patterns in electron structure, reactivity, bonding, and physical properties become visible across rows and columns.
The James Webb Space Telescope
The James Webb Space Telescope is a large infrared space observatory that studies early galaxies, star formation, exoplanet atmospheres, and objects across the universe from a stable observing region near the Sun-Earth L2 point.