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Broecker, Wallace S.; Denton, George H. – Scientific American, 1990
Discusses the link between astronomical information and the ice ages. Explains the use of isotope measurement data from the sea-floor sediments, glacial ice, and water. (YP)
Descriptors: Astronomy, Earth Science, Oceanography, Radiation Effects
Peer reviewed Peer reviewed
Abrams, Eleanor; Wandersee, James H. – Journal of Research in Science Teaching, 1995
Tested Richard Duschl's triadic model of the growth of scientific knowledge against research practices of 10 accomplished life scientists. Reports that the scientists were willing to change their aims, methods, or theories and were both realists and relativists depending on the scientific discourse about the phenomena in question. Discusses…
Descriptors: Biological Sciences, Biology, Higher Education, Models
Hegstrom, Roger A.; Kondepudi, Dilip K. – Scientific American, 1990
Discusses how handedness at one level may give rise to handedness at another. Presents examples from plants and animals, molecules, atoms, to elementary particles. Examines the chiral symmetry in life and when it starts. (YP)
Descriptors: Biological Sciences, Biology, Chemical Reactions, Force
Stein, Ross S.; Yeats, Robert S. – Scientific American, 1989
Points out that large earthquakes can take place not only on faults that cut the earth's surface but also on blind faults under folded terrain. Describes four examples of fold earthquakes. Discusses the fold earthquakes using several diagrams and pictures. (YP)
Descriptors: Earth Science, Earthquakes, Geology, Plate Tectonics
Peer reviewed Peer reviewed
Fox, R. O.; Fan, L. T. – Chemical Engineering Education, 1990
Discusses the master equation of a stochastic model in chemical process systems. Presents a solution technique known as the System Size Expansion. (YP)
Descriptors: Chemical Engineering, Chemical Reactions, Engineering, Equations (Mathematics)
Peer reviewed Peer reviewed
Sandler, Stanley I. – Chemical Engineering Education, 1990
Establishes a theoretical basis for both understanding and testing the molecular level assumptions in mixtures. Considers activity coefficient models and equation of state mixing rules. (YP)
Descriptors: Chemical Engineering, Computer Simulation, Engineering, Equations (Mathematics)
White, Robert S.; McKenzie, Dan P. – Scientific American, 1989
Investigates the nature of catastrophic volcanism and the rifting process. Describes two kinds of evidence: quantitative descriptions of rock melting and a wide range of observations. Discusses examples of continent growth in the North Atlantic, India and the Seychelles islands, and the South Atlantic. (YP)
Descriptors: Earth Science, Geographic Regions, Geology, Geophysics
Peer reviewed Peer reviewed
Reiss, Michael – School Science Review, 1989
Presents the mathematics of body size and surface area to volume. Examines arguments used related to the topic. Concludes that while some of the traditional arguments are valid, most are not. One analysis for an organism is provided in an appendix. (YP)
Descriptors: Biology, Body Composition, Physical Characteristics, Physiology
Peterson, Ivars – Science News, 1991
Described are the idea of chaos and the ability to control the chaotic behavior of a real-world physical system. Included is an explanation of the methodology and applications in biology and chemistry. (KR)
Descriptors: Biology, Chaos Theory, Chemistry, College Science
Clement, John – 1988
Some central issues in discussions of creative processes in science are: (1) the mechanism(s) by which hypothesis formation takes place; (2) the sources of new knowledge during hypothesis formation; and (3) the "Eureka" versus steady accumulation (accretion) issue concerning the pace of change during hypothesis formation. This paper…
Descriptors: Cognitive Processes, Creative Thinking, Hypothesis Testing, Models