Presents a simple, practical, and inexpensive method for growing microorganisms that will help middle school students experience microorganisms and introduce them to important science concepts. Students grow microorganisms and investigate questions concerning environmental factors that affect growth of populations. (LZ)

Describes a number of activities designed to assist student understanding of the phenomenon of light bending when it passes from one meduim to another. (JR)

Describes an experiment where elementary students determine the optimum angle of inclination for the greatest amount of distance a marble will roll when accelerated down an inclined plane. (PR)

Presents a sequence of activities designed to allow eighth grade students to deal with one of the fundamental relationships that govern energy distribution. Activities guide students to measure light bulb brightness, discover the inverse square law, compare light bulb light to candle light, and measure sun brightness. (two references) (MCO)

Uses computers to help students identify variables controlling pendulum period. A program written in BASIC for the Apple computer is provided. The activities are useful for developing science skills, mathematics skills, and computer skills. (PR)

Presents a problem-solving activity in which students determine the effects on the water level in a pool when rocks are removed from a boat floating in the pool and placed into the water. Students discuss the problem, design an experiment to test solutions, conduct the experiment, and draw conclusions. (MDH)

Presents several fun activities and teacher demonstrations which simplify terms and condense science concepts for teaching about the lever, wedge, wheel and axle, screw, pulley, and the inclined plane. Includes objectives, materials, procedures, suggested follow-up assignments, and diagrams. (RT)

Science activities with soap bubbles for primary school children are described in this article. Another activity involves children in determining the whereabouts of sugar as it dissolves in water. (SA)

Discusses traditional school demonstrations and experiments in hydrotropism. Explains that these experiments seem to "prove" hydrotropism, but yet most botanists reject hydrotropism. Teachers continue to teach the concept because it is logical and the experiments are simple. (PR)

Presents an activity that models the changes in the concentration of carbon dioxide gas in the atmosphere during the last 200 years as determined from glacial records. (PR)

Describes an activity where students generate a plan and test their ideas on trying to cope with a small oil spill. (PR)

Describes an activity measuring the amount of dissolved carbon dioxide in carbonated water at different temperatures. The amount of carbon dioxide is measured by the amount of dilute ammonia solution needed to produce a pH indicator color change. (PR)