GED Science 2024

Abiogenesis --Belief that livings things may develop from lifeless matter Acid --A compound that In water produces hydrogen ions, usually tastes sour, a pH less than 7 Acid rain --rain containing acids that form in the atmosphere when industrial gas emissions (especially sulfur dioxide and nitrogen oxides) combine with water Alloy --Homogenous mixture composed of two or more metals Amoeba --A type of Protozoan that has no permanent shape Amorphous --having no definite form or distinct shape Amplitude --The maximum value of a wave or vibration Anaerobic respiration --Fermentation, or respiration in the absence of oxygen Anemia --lack of a normal number of red blood cells Anode --Positive electrode of an electrolytic cell; negative terminal of a battery; negative plate of a vacuum tube; site where oxidation occurs Antibiotic --compound that blocks the growth and reproduction of bacteria Antibody --A protein, usually in the blood of an organism, that serves to counteract the effects of disease-producing bacteriabor viruses Antidote --a remedy that stops or controls the effects of a poison Anticeptic --A substance that prevents the growth or activity of bacteria Antitoxin --Substance in the body neutralizes toxins Appendix --Wormlike, narrow part of the alimentary canal, in the lower right-hand part of the human abdomen Armature --A piece of metal or a coil of wire that moves back and forth, or rotates, in a magnetic field Artery --a blood vessel that carries blood away from the heart to the periphery of the body Arthropods --A group of organisms that have jointed appendages, an exoskeleton, bilateral symmetry, and reproduce sexually; insects, arachnids, millipedes and cenitpedes, and crustaceans Ascorbic acid --Vitamin C; found in citrus fruits, tomatoes, and green vegetables Aseptic --Free of living bacteria Asexual reproduction --Producing offspring without inion of individulaln or germ cells Assimilation --Process by which digested food is utilized by the body to build up or repair cells Assimilation --Process by which digested food is utilized by the body to build up or repair cells Asteroid --One of a group of "minor plants" between Mars and Jupiter, of which about 1,500 are known Atmosphere --The whole mass of gases surrounding a planet Atom --smallest particle of an element, consisting of a nucleus surrounded bynelectrons Atomic fission --The breaking down of an atomic nucleus, into two or more parts, with a great release of energy Atomic fusion --The joining of atomic nuclei to form heavier nuclei, such as deuterium (heavy hydrogen) and tritium (another isotope of hydrogen) to make helium, resulting in the release of enormous quantities of energy Auricle --An upper chamber of the heart thatnreceives blood from the veins-also called the atrium Autotroph --Organism (a green plant) that nourishes itself by making organic materials out of inorganic Auxin --a plant hormone that promotes root formation and bud growth Bacillus --aerobic rod-shaped spore-producing bacterium Bacteria --(microbiology) single-celled or noncellular spherical or spiral or rod- shaped organisms lacking chlorophyll that reproduce by fission Balance in Nature --the balence of animals and palntes in their enviroment Barometer --an instrument that measures atmospheric pressure