Question | Answer |
Abiotic | nonliving chemical and physical factors in the environment |
Absolute zero | (cryogenics) the lowest temperature theoretically attainable (at which the kinetic energy of atoms and molecules is minimal) |
Abyss | a bottomless gulf or pit |
Acceleration | an increase in rate of change |
Acid | An acid (from the Latin acidus meaning sour) is traditionally considered any chemical compound that, when dissolved in water, gives a solution with a hydrogen ion activity greater than in pure water, i.e. a pH less than 7.0. ... |
Acoustic | the study of the physical properties of sound … Acoustics is the interdisciplinary science that deals with the study of sound, ultrasound and infrasound (all mechanical waves in gases, liquids, and solids). A scientist who works in the field of acoustics |
Acquired behavior | behavior that is gotten through environmental forces |
Adaptation | Adaptation is one of the basic phenomena of biology. It is the process whereby an organism becomes better suited to its habitat. Also, the term adaptation may refer to a characteristic which is especially important for an organism's survival. ... |
Adult | a biologically grown or mature person |
After birth | the passing of the placenta following birth |
Aftershock | a tremor (or one of a series of tremors) occurring after the main shock of an earthquake |
Agnatha | superclass of eel-shaped chordates lacking jaws and pelvic fins: lampreys |
Agua | largest known toad species |
Air mass | a large body of air with uniform characteristics horizontally |
Air sac | An air-filled space in the body of a bird that forms a connection between the lungs and bone cavities and aids in breathing and temperature…Sacs that communicate with the respiratory, air-filled membranous system in birds and primates. |
Albino | A person or animal lacking normal pigmentation, with the result being that the skin and hair are abnormally white or milky and the eyes have a pink color. |
Alcohol | A colorless volatile flammable liquid, C 2 H 5 OH, synthesized or obtained by fermentation of sugars and starches and widely used. |
Algae | primitive chlorophyll-containing mainly aquatic eukaryotic organisms lacking true stems and roots and leaves |
Alloy | A homogeneous mixture or solid solution of two or more metals, the atoms of one replacing or occupying interstitial positions between the atoms of the other: Brass is an alloy of zinc and copper. |
Alluvial fan | a fan-shaped deposit where a fast flowing stream flattens out |
Alpine | Of, relating to, or characteristic of the Alps or their inhabitants. Of or relating to high mountains. |
Alternate current | In alternating current (AC, also ac) the movement (or flow) of electric charge periodically reverses direction. ... |
Altitude | The height of a thing above a reference level, especially above sea level or above the earth's surface. |
Alveoli | The plural of alveolus. The alveoli are tiny air sacs within the lungs where the exchange of oxygen and carbon dioxide takes place. ... |
Amber | A hard translucent yellow, orange, or brownish-yellow fossil resin, used for making jewelry and other ornamental objects. |
Amnionic fluid | The fluid bathing the fetus and serving as a shock absorber. |
Amphibian | A cold-blooded, smooth-skinned vertebrate of the class Amphibia, such as a frog or salamander, that characteristically hatches as an aquatic larva with ... |
Amplification | To make larger or more powerful |
Analysis | a detailed examination or an investigation of the component parts of a whole and their relations in making up the whole |
Anemia | a deficiency of red blood cells |
Anemometer | a gauge for recording the speed and direction of wind |
Angiosperm | plants having seeds in a closed ovary |
Angler | a fisherman who uses a hook or an anglerfish |
Animal | Any organism of the Kingdom Animalia, distinguished from plants by certain typical characteristics such as the power of locomotion, fixed structure and limited growth, and nonphotosynthetic metabolism |
Ankle | a gliding joint between the distal ends of the tibia and fibula and the proximal end of the talus |
Annelida | Any of various worms or wormlike animals of the phylum Annelida, characterized by an elongated, cylindrical, segmented body with bristles and including the earthworm and leech. |
Annual plant | An annual plant is a plant that usually germinates, flowers, and dies in one year. True annuals will only live longer than a year if they are protected from weather conditions. |
Anther | the part of the stamen that contains pollen |
Anthropologist | a social scientist who specializes in anthropology which is the study of the origin, behavior, and the physical, social, and cultural development of humans. |
Anus | the excretory opening at the end of the alimentary canal |
Appendages | An appendage in the broadest sense is an additional or subsidiary part existing on, or added to, something which can generally still function if the appendage is not there. |
Aqua | water |
Aquarium | a tank or pool or bowl filled with water for keeping live fish and underwater animals |
Aquatic | relating to or consisting of or being in water |
Aqueduct | A pipe or channel designed to transport water from a remote source, usually by gravity. |
Aquifer | underground bed or layer yielding ground water for wells and springs etc |
Arachnid | air-breathing arthropods characterized by simple eyes and four pairs of legs |
Archipelago | a group of many islands in a large body of water |
Arctic | A region between the North Pole and the northern timberlines of North America and Eurasia. |
Area | a particular geographical region of indefinite boundary (usually serving some special purpose or distinguished by its people or culture. a quantity expressing the two-dimensional size of a defined part of a surface, typically a region bounded by a close |
Arrow (chemical equation) | The arrow points in the direction of the reaction, from the reactants to the products. |
Artery | a blood vessel that carries blood from the heart to the body |
Arthropoda | jointed-foot invertebrates: arachnids |
Asexual reproduction | reproduction without the fusion of gametes |
Asteroid | any of numerous small celestial bodies composed of rock and metal that move around the sun (mainly between the orbits of Mars and Jupiter) |
Asteroid belt | the region of interplanetary space between Mars and Jupiter where most asteroids are found |
Astro | Involving astronomy |
Astrogeologist | The geology of celestial bodies. |
Astronomy | The scientific study of matter in outer space, especially the positions, dimensions, distribution, motion, composition, |
Atmosphere | The gaseous mass or envelope surrounding a celestial body, |
Atmospheric pressure | the pressure exerted by the atmosphere |
Atoll | an island consisting of a circular coral reef surrounding a lagoon |
Auditory | of or relating to the process of hearing |
Aurora australis | An aurora that occurs in southern regions of the earth. ... |
Auto | (self) On its own or one's own, by its own action |
Auxin | a plant hormone that promotes root formation and bud growth |
Aves | (ornithology) the class of birds |
Aviary | a building where birds are kept |
Aviation | A general term including the science and technology of flight through the air. |
Axis | A straight line about which a body or geometric object rotates or may be conceived to rotate |
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