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Toward a Sustainable Future ch. 5-9 Flashcards

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416559019Younger Dryas eventa rapid change in global climate that brought 1,500 years of cold weather about 10,000 to 12,000 years ago
416559020pollutionthe presence of a substance in the environment that prevents the functioning of natural processess and produces undesirable environmental and health effects
416559021crude death rate (CDR)the number of deaths per 1,000 individuals per year
416559022natural lawsgeneralizations derived from our observations of matter, energy, and other phenomena
416559023omnivoresan animal that feeds on both plant material and other animals
416559024sustainable agricultureagriculture that maintains the integrity of soil and water resources such that it can be continued indefinitely
416559025fire climax ecosystemsecosystems that depend on the recurrence of fire to maintain the existing balance
416559026chlorophyllthe green pigment in plants responsible for absorbing the light energy required for photosynthesis
416559027cellulosethe organic macromolecule that is the main part of a plant's cell walls
416793094biomass pyramidthe structure that is obtained when the respective biomasses of producers, herbivores and carnivores in an ecosystem are compared. Producers have the largest biomass, followed by herbivores and then carnivores
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