Discusses the advantages of opening class sessions with demonstrations. Describes 11 demonstrations, including cloud formation, lather expansion, singing glassware, a flickering filament, balancing a fork and spoon, spinning an egg, television distortion, a roll race, a vortex generator, a suspended egg, and flight magic. (YP)

Presents abstracts of innovative activities of students in grades 7 through 12. Projects include community surveys, student or teacher initiated home/school experiments, scientist-supervised research by high school students, community and school service projects. (EB)

Provides background information on the equipment and knowledge necessary to do an astronomy activity on the earth's rotation. Details an activity in which students can measure the rotation of the earth using a camera and the stars. (CW)

Summarized are five activities involving collection of postage stamps picturing volcanoes or related scenes for use as part of or at the conclusion of the study of volcanoes. Activity topics include volcanic features, location of volcanoes, related land features where volcanoes are not located, and making one's own volcano stamps. (DS)

Presents a design for constructing a colorimeter as an alternative to the more expensive spectrophotometer. The materials cost less than $25.00. (PR)

With an aquarium and a few tools, a simple apparatus to quantitatively illustrate absorption rates of light passing through fresh, salt, and other waters (such as distilled water) can be constructed. Students learn that extinction rates are different and that the intensity/depth relationship is exponential. (DH)

Provides information on the parts, materials, prices, dimensions, and tools needed for the construction of a telescope that can be used in high school science laboratories. Includes step-by-step directions and a diagram for assembly. (RT)

Identifies the characteristics and components of a quality laboratory program for secondary science students. Suggests approaches, questions, and activities that aim to provide challenging experiences in the sciences. Also provides a listing of recommended laboratory standards and procedures. (ML)

Discusses an astronomy simulation activity introducing the concepts of rotation, revolution, and retrograde motion. Describes the activity procedures in classrooms. (YP)

Described is a method of utilizing meat thermometers to replace bulb thermometers, a chromosome transfer model utilizing colored paper and plastic eggs, a chemical equilibruim experiment utilizing complex ions of Cobalt, and a method of determining the volume of a cylinder. (SL)

Discusses the approach taken in a science project program at a math/science/computer magnet school. Explains the procedures, student requirements, and scheduling needs of the program. Contains a checklist of 17 steps for completion of the project. (ML)

Provides descriptions of activities and programs that have been successful with secondary science students. Includes ideas related to repairing radio-controlled cars, cooperative science-library center, observation exercises, recordkeeping skills and peer grading, DC power supply, chemistry of poison ivy, spore science, and a tic-tac-toe review…

Points out the instructional applications and program possibilities of a unit on model rocketry. Describes the ways that microcomputers can assist in model rocket design and in problem calculations. Provides a descriptive listing of model rocket software for the Apple II microcomputer. (ML)

Describes a recently discovered and translated work by Archimedes in which he constructed a balance to determine the amount of gold in an alloy of gold and silver. A description of the balance (translated verbatim) as found in Archimedes' work "On Balances" is included. (JN)