Examines whether extracurricular science activities can reduce the decline in attitude toward school science in junior and senior high school levels. Concludes that students exposed to extracurricular science activities had a more positive attitude toward school science. Sixteen references are listed. (YP)

A demonstration that can be used to illustrate diffusion and osmosis is presented. Discussed are materials, procedures, and an explanation for the effect. (CW)

Presents an activity for upper elementary students called "Soil Structure and Ground Water." Provides procedures, materials, key concepts, background, and extensions. (YP)

Presented is an activity in which students construct a model of plate divergence with two sheets of paper to show the separation of two continental plates in a system of spreading ridges and faults. Diagrams and procedures are described. (CW)

Described is a science activity which illustrates the principle of uncertainty using a computer simulation of bacterial reproduction. Procedures and results are discussed. Several illustrations of results are provided. The availability of a computer program is noted. (CW)

Provided are suggestions for 23 different activities which can be used to discuss and investigate ocean currents and how they affect human activity. Several maps and charts accompany the activities. A list of 15 resources is included. (CW)

Presented is an activity designed to help students understand and appreciate the scale and order of the geologic timetable and begin to infer a relationship between biologic, chemical, and geological events. Procedures, background information, student worksheets with answers, and a list of materials are included. (CW)

Presented are the instructions and suggested variations on a card game designed to help children learn to match shapes. A set of cards which may be photocopied for use are included. (CW)

Described are six multipulse experiments with an emphasis on their application to common problems in chemistry. Exercises in relaxation time measurement, spin echoes, and polarization transfer are proposed. (CW)

Directions for the construction of an electronic version of an electroscope are provided. Demonstration and operation of this apparatus is discussed. A list of components and a schematic diagram are provided. (CW)

Described is a backyard activity that can be used to introduce children to the divisions of the plant and animal kingdoms in their local environment. Preparation, procedures and followup are discussed. Background information on taxonomy and two activity cards are provided. (CW)

Discussed are several phenomena associated with earthquakes. Included are seismic waves, plate movement, and earthquake measurement. Diagrams of different plate boundary types are included. An activity for teaching these events to elementary school children is provided. (CW)

Described is an interdisciplinary unit on animal care for elementary school students. Included are research strategies; a semantic map; ideas for integrating reading, writing, and science; and a discussion of the benefits of using imagination in learning. (CW)

Described is an experiment in which students are able to synthesize an unnatural compound having the odor and flavor of coconuts. Laboratory equipment, procedures, and analysis of the product are discussed. (CW)

Described is an alternative method of culture isolation that uses streaking on specialized media. An activity in which different media are tested for selectivity is presented including a list of materials and procedures. A chart of colony morphology is given. (CW)