Presents a unit of study about acorns that involves science process skills and emphasizes interdisciplinary possibilities. (MKR)

Using the movie Star Wars as inspiration, an activity is presented to introduce students to water's cohesiveness and how the surface tension of water can be disrupted. (MKR)

Presents activities that use antifreeze to introduce students to concepts such as density, specific gravity, solutions, and freezing and boiling points. (JRH)

Describes how the use of a videotape to record the history of a soap bubble allows a study of many interesting events in considerable detail including interference fringes, convection and turbulence patterns on the surface, formation of black film, and the ultimate explosion of the bubble. (JRH)

Presents an investigation that engages students in constructing models of houses to examine the dynamics of energy flow patterns. Uses the learning cycle procedure that allows students to experience the processes of science and to use higher level thinking skills. (JRH)

Describes a classroom exercise that uses a letter from Max Delbruck to George Beadle to stimulate interest in the mechanics of a nonoverlapping comma-free code. Enables students to participate in the rich history of molecular biology and illustrates to them that scientists and science can be fun. (JRH)

Describes how to construct a simple DC electric motor. (MKR)

Presents an activity that involves making peanut butter in the laboratory as a way to teach students the chemistry concepts of emulsification, solubility, and formulation. Enables students to realize that they can actually create or modify the physical and sensory characteristics of peanut butter and taste the differences in their work. (JRH)

Describes using stock liquid crystal postcards as inexpensive classroom thermometers. Also suggests using these postcards as a good visual temperature indicator for classroom demonstrations such as temperature gradients. One such activity is provided. (MVL)

Presents activities for helping elementary students learn about Newton's third law of motion. Several activity cards demonstrate the concept of the law of action and reaction. The activities require only inexpensive materials that can be found around the house. (SM)

This activity involves elementary students in simulating water purification techniques by finding ways to clear up soapy water. An introduction discusses water use and conservation. Materials needed and step-by-step procedure are provided. (LZ)

Discusses the basic principles of baking soda chemistry including the chemical composition of baking soda, its acid-base properties, the reaction of bicarbonate solution with calcium ions, and a description of some general types of chemical reactions. Includes a science activity that involves removing calcium ions from water. (LZ)

Presents a Project WET water education activity. Students are introduced to the concept of watersheds by collecting data about water flowing over their school grounds. Helps students understand that they live and attend school within a watershed. (LZ)

Describes a convenient method of displaying color effects (colors of the blue sky, white clouds, and red sunsets) of Rayleigh and Mie scattering. (ZWH)