Fitness is the ability to survive and reproduce, not necessarily a measure of physical fitness. A reaction from which heat is lost eg: Molecules of fatty acids or glycerol.
Used as a food store, insulation and for shock absorption. A region in space that is defined by a vector function. Splitting the nucleus of an atom into smaller units. An action transfer of energy that will accelerate a body in the direction of the applied force.
See Newtons Laws of Motion. A highly reactive molecule used to start the production of a polymer chain. The rate as which periodic motion repeats itself. The interaction between surfaces: Those particles that are not known to contain any smaller components: Change of state of a substance from a solid to a liquid.
The joining together of two atomic nuclei. Sex cells spermatozoa or ova that carry the genes donated by each parent. Particles that mediate the transfer of energy between other particles: A unit of inheritance. A section of DNA. The collective noun for a set of genes. The human genome contains genes. The attraction that all bodies have for one another.
Protons and neutrons are the most common hadrons. The time taken for the level of radioactivity in an element to halve. Highly reactive gases forming group 7 of the periodic table.
The internal energy of a body substance. Compounds containing only hydrogen and carbon atoms. One which obeys the ideal gas law. At low pressures, real gases behave like ideas gases. Tendency of a body to remain at rest or move in straight line. The features of an organism are determined by a set of chromosomes. These originate in the parents and are passed on to an offspring during fertilisation. It follows then that since chromosomes are inherited, all the features of an organism must be inherited.
Atom with an unbalanced electrical charge caused by the loss or gain of one or more electrons. An bond formed by the electro-magnetic attraction between ions of opposite charge. Chemical compounds with the same composition but different shapes.
The shape of a molecule. The isomeric structure is determined by the order in which the atoms are bonded together. An element that has more or less neutrons than normal.
Many isotopes are radioactive. The energy possessed by a body in motion. The amount of energy required to change a solid to a liquid or liquid to a gas. The amount of energy in the universe is fixed. It cannot be created or destroyed only changed from one state to another. Heat cannot pass from a cold to a hot body. The opposite condition where heat always flows from a hot to a cold body is valid for the whole universe.
Convex lenses focus and concave lens diffuse light waves. Fundamental particles that are relatively non-reactive and capable of an independent existence: The visible part of the electromagnetic spectrum: White light is a combination of all the above colours.
A body which produces a magnetic field. All magnets are di-pole and follow the rule that like poles repel and unlike poles attract. The quantity of matter in a body. Two quark hadrons , the product of radioactive decay. Elements characterised by their opacity, malleability and thermal and electrical conductivity.
Organelles that convert glucose into energy. The number and types of atom in a molecule. For example the molecular formula of methane is CH 4 , one atom of carbon and four atoms of hydrogen.
A group of atoms bonded together. It is the smallest part of a substance that retains the chemical properties of the whole. The product of mass times velocity. Momentum is conserved in any system of particles. Small molecules that link together to form a polymer.
A reaction in which the characteristics of an acid or base disappear. Particles with zero charge forming part of an atomic nuclei. Newtons Laws of Motion. Classical laws which enable the prediction of the path of any object from a grain of sand to entire galaxies:. A body will remain at rest or move with a constant velocity unless acted upon by an outside force. The acceleration of a body is proportional to the applied force. This is expressed by the universal formula: That's because most of us grew up thinking that pterosaurs like the pterodactyl were dinosaurs, and that's what we called them.
They were actually flying reptiles, cousins to the dinosaurs that evolved on a separate branch of the reptile family tree. Pterosaurs were the first animals after insects to evolve powered flight by flapping their wings to generate lift; you can find out more about pterosaurs from the video above.
You probably understand what de-extinction is, but you might not understand what kinds of animals we can bring back—and you have Hollywood to thank for that.
Despite what you saw in Jurassic Park , scientists will never be able to resurrect non-avian dinosaurs from extinction; any DNA that might be found is just too old to be used.
But for other species, science might find a way in the not-too-distant future. In fact, in , researchers implanted a goat egg with genes from an extinct Spanish mountain goat and used a goat-ibex as a surrogate; the resulting animal lived for just a few minutes, but the experiment proved it could be done.
Scientists expect that technological breakthroughs—and genetic data gathered from specimens—will provide ways to revive recently extinct species think passenger pigeons, and maybe even wooly mammoths.
It sounds cool, but de-extinction comes with a number of thorny scientific and ethical questions, as Museum Curator Ross MacPhee explains in the video above. Poisonous and venomous Though the words poison and venom are often used interchangeably—and although they both describe a toxin that interferes with a physiological process—there is a difference. Meteor, meteorite, and asteroid Although some use these terms interchangeably, meteors, meteorites, and asteroids are all different things.
Theory When most people use the word theory, they're talking about a hunch or guess. Common ancestor When you use the term common ancestor, you might mean that one creature evolved from another.
Hominins Homo sapiens are the only remaining descendants of a once-varied group of primates called the Hominini. Pterosaurs Chances are, you probably haven't been using this word much at all. See science defined for English-language learners. See science defined for kids. The program encourages students to pursue a career in science. Students are required to take two sciences. These example sentences are selected automatically from various online news sources to reflect current usage of the word 'science.
Middle English, from Anglo-French, from Latin scientia , from scient-, sciens having knowledge, from present participle of scire to know; perhaps akin to Sanskrit chyati he cuts off, Latin scindere to split — more at shed. Sci ence is the understanding of the world and how everything in it works. A person's con sci ence is the knowledge of right and wrong and the feeling that he or she should do right.
Anything that is con sci ous knows what it is feeling. All synonyms and antonyms for science Spanish Central: Translation of science Nglish: Translation of science for Spanish speakers Britannica English: Translation of science for Arabic speakers. What made you want to look up science? Please tell us where you read or heard it including the quote, if possible. Subscribe to America's largest dictionary and get thousands more definitions and advanced search—ad free!
Test Your Knowledge - and learn some interesting things along the way. You might've seen this one before.
Science Dictionary - Glossary of Terms & Scientific Definitions Welcome to Science Dictionary, the leading information source for defintions of terms for all different fields of .
[noun] In science, an abstract is a brief statement of essential information contained within a document or presentation. An abstract is not an introduction, rather it concentrates the most pertinent information to .
A science dictionary includes many technical terms with precise, specialized meanings—terms not normally found in general dictionaries—making it an invaluable . Science definition is - the state of knowing: knowledge as distinguished from ignorance or misunderstanding. How to use science in a sentence. the state of knowing: knowledge as distinguished from ignorance or misunderstanding.
Scientific terminology is the part of the language that is used by scientists in the context of their professional activities. While studying nature, scientists often encounter or create new material or immaterial objects and concepts and are compelled to name them. Many of those names are known only to professionals. However, due to popularization of science, they gradually become part of common . Quick Reference. GLOSSARY OF SCIENTIFIC TERMS. Scientific Divisions | Animals | Elements | Ologies | Motion | Particles. absolute zero. The lowest theoretical temperature (0K = °C) where all molecular activity ceases.