Reviews ideas and evidence bearing on the origin of life. Shows that evidence to support modifications of Oparin's theories of the origin of biological constituents from inorganic materials is accumulating, and that the necessary components are readily obtained from the simple gases found in the universe. (AL)

Describes and defines technology, and describes future possibilities in the realm of biology due to technological advances. (TS)

Piagetian tasks varying in complexity were administered to elementary school children in grades K-3. Differences between the attainment of similar concepts occurred when the tasks required different types of inference patterns, had different goals, or involved different percepts. Discusses curriculum implications. (AL)

Dirac's classical conclusions, that the values of e2, M and m are constants and the quantity of G decreases with time. Evoked considerable interest among researchers and traces historical development by which further experimental evidence points out that both e and G are constant values. (PS)

The approach generally used in writing undergraduate textbooks on Atomic and Nuclear Physics presents this branch as historical in nature. Describes the concepts of astrophysics, plasma physics and spectroscopy as contemporary and intriguing for modern scientists. (PS)

In this critique of June T. Fox's article (EJ 003 566), author contends that Bruner has resolved experimentally some of the rather muddy philosophical ideas suggested by Dewey and that the remaining differences between them may ultimately be seen as differing aspects of an identical problem. (Author/MB)

The answers from test questions on circular motion are analyzed in terms of the misunderstandings of resultant force, kinematics, interaction, and centrifugal force. (DS)

Presents the procedures, and findings of a study designed to identify principles in astronomy, geology, meterology, oceanography and physical geography pertinent to general education programs in junior high schools. (LC)

The Problem-Solving Skills Test" developed by the authors can be used to evaluate student abilities, regardless of what science programs the student has studied. Also, it can be used to evaluate whether the objectives of new elementary school science curricula have been attained. Major limitation is the lack of external criteria for determining…