Present knowledge about Mars is compared with past beliefs about the planet. Biological experiments that indicate life may exist on Mars are interpreted. Life patterns or biological features that might be postulated for extraterrestrial life are presented at the molecular, cellular, organism, and ecosystem levels. (DS)

Discusses the consequences and possible impact of changes being caused by outside agencies rather than by science teachers. Such agencies are National Assessment, national curriculum committees, and outside groups determining teacher adequacy. Suggested teacher initiated changes include changing the sequence of high school courses, developing new…

Proposes a K-12 program to fill the need for population environment education. Lists six basic concepts that should be included in the program. (DS)

Outlines an experimental course for non-science majors that concentrates on science-related community problems. Some of the topics explored by the students are explained. Five schools and 400 students are involved. (DS)

Provides laboratory design and materials needed to have students prepare cell cultures. Necessary techniques are explained along with an outline of some basic and advanced exercises. (DS)

Frequent textbook errors about radioactivity are discussed Examples include deflection of alpha particles by thin foils, radioactive decay, and binding energy. (DS)