GED Science Study Guide

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