Directions for constructing a hand glider out of free or inexpensive materials are combined with measurements, tests and recordings of its flight done in metric units. (BR)

Describes how to plan and execute an extended field trip which provides first hand observation of biological and cultural systems. Socialization of the participants was achieved through common planning and goal achievement. (BR)

Describes how to construct a model of a DNA molecule with inexpensive materials. (BR)

A list of practical objectives was constructed using laboratory experiments and previous authors' lists as a basis for design. Data were presented on the frequency of occurrence of each objective in terms of previous authors and CSE and GCE examination boards. (GS)

Presents the pros and cons of nuclear power systems. Includes a discussion of the institutional status of the AEC, AEC regulatory record, routine low-level radiation hazards, transport of radioactive materials, storage of wastes, and uranium resources and economics of supply. (GS)

Describes two exercises which demonstrate to students the mechanics involved in arriving at logical conclusions. (BR)

Discusses medical practices and treatments such as blood-letting, purging, leeching and cupping, animal magnetism, homeopathy as well as the quackery problem existing in the present. (BR)

Advocates that scientists set their imaginations to work and assume a leading role in finding standby solutions to impending problems such as drinking water supply, foodstuffs, and energy. (GS)

Utilizes a rotating table and strobe photographs to provide students with a direct record for quantitatively analyzing rotational effects. (GS)

Describes an approach wherein the student selects a single type of simple item and uses it as the basis for making a physics demonstration. Provides an example that uses a cheese dish in eighteen different demonstrations. (GS)

Describes the result of dropping objects of similar size and shape but of differing weight through air. Compares ideas on motion of Galileo and Aristotle. (GH)

Discusses the ratio of energy dissipated as sound to the mechanical output of devices. Considers noise levels, ranges vs. peaks, noise indexes, and health hazards. Indicates some problems vs. solutions in the technology of noise control. (GH)