Reproduces the contents of a CEEP instructional module on the concept of radioactive decay. Includes objectives, materials, procedure, and summary questions. Reproducable illustrations also included. (MA)

Explores the use of Landsat imagery in mapping and updating land use for the purpose of planning. Examines Gulf Coast Mexico as a case study, because modern agricultural techniques used to expand the ranching industry have significantly altered the landscape. (Author/BC)

Discusses the birth of the universe and its death. Whether the universe is closed or open is also discussed. (HM)

Expansion of activity and confirmation of new technological directions characterized several fields of exploration geophysics in 1977. Advances in seismic-reflection exploration have been especially important. (Author/MA)

Early land plants and their ancestry remained an important, controversial issue in paleobotany this past year. Current research and theories on the subject are reviewed. (MA)

Contains the contents of the Student Investigation booklet of a Crustal Evolution Education Project (CEEP) instructional modules on earthquakes. Includes objectives, procedures, illustrations, worksheets, and summary questions. (MA)

Six underlying assumptions of the Crustal Evolution Education Project (CEEP) are analyzed. This article reports that all assumptions have been validated and that CEEP is accomplishing its major purposes. (MR)

Discusses earth science enrollments in grades 9 to 12 during the period 1960 to date. (SL)

Describes techniques for studying hand specimens of polished rock slabs. (SL)

Describes a computer assisted program designed to aid students in detailed description/identification of igneous rocks. (SL)

Describes an introductory geology seminar conducted almost entirely upon reviewing current newspaper articles relating to earth sciences. (SL)

Discusses the need to teach earth science material at the cognitive level of development of the student and presents examples of earth science related tests of formal and concrete operational competencies. (SL)

Describes an experiment simulating heat transfer and overall energy loss in upper layers of soil surfaces. (SL)

Describes activity relating to the study of trees. (SL)

Presents a rock cycle diagram suitable for use at the secondary or introductory college levels which separates rocks formed on and below the surface, includes organic materials, and separates products from processes. (SL)