Presents an activity on measurement and points out the importance of units which, in most cases, are omitted by students. Focuses on measurement in informal settings, indirect measurement, ratio and scales, and surface area to volume ratio. (YDS)

Presents two demonstrations involving organic electrolytes, strong electrolytes versus weak electrolytes and weak electrolytes versus nonelectrolytes. (KHR)

Describes a 90-minute "Island Watershed" activity to help earth science students understand the concept of the water cycle. Introduces a surface waters unit appropriate for students in grades 7-10. Includes watershed project guidelines. (Author/KHR)

The Dallas Science Place contains 55 interactive displays on observable phenomena, organized into 7 topic areas: motion, waves, matter, electromagnetism, energy, change, and entropy. Attempts were made to keep the exhibits' forms elemental, so that the underlying physical phenomena could be readily observed and experienced. (JDD)

Teachers are provided with several experiments for primary students that address concepts related to the properties of air, sound, and water. (IAH)

Presents activities designed to build an understanding of why the physical characteristics of small animals such as the water strider, water spider, and the basilisk make it possible for the animals to use the surface tension of water to their advantage. Discusses the concept of geometrical scaling. (JRH)

Presents a practical introduction to the phenomenon of static electricity. (Author/MKR)

Presents activities that use a simple homemade apparatus called "the cannon" to demonstrate Newton's Third Law. Reviews the chemistry concepts behind the ignition of the cannon and presents the Momentum Lab and the Projectile Motion Lab. (JRH)

Presents an activity designed for introductory physics courses that enhances students' understanding of the concept of waves, especially the superposition of waves. Uses two different approaches that end with the same result and enable students to see the connection between spatial and temporal properties of waves and their superposition. (JRH)

Presents an assignment that involves forming student companies to determine and defend cost estimates for producing a silver Oscar statuette. Includes an assessment rubric for cooperative effort. (JRH)

Presents an activity to investigate soil nitrification and denitrification. Enables students to visualize the transformation of ammonium to nitrate and its reduction to nitrogen gases. (JRH)

Presents a unit on volcanoes for third- and fourth-grade students. Includes demonstrations; video presentations; building a volcano model; and inviting a scientist, preferably a vulcanologist, to share his or her expertise with students. (JRH)

Describes the procedures for starting and maintaining a bee hive to enhance any lesson on the study of bees. (ZWH)

Presents an activity in which students: identify agricultural crops that are grown in Great Lakes states, understand how global climate change will affect these crops, hypothesize about crops that could replace these, compare the current crops' economic value with projected replacement crops, and analyze the impact of global climate on the…

Presents an activity exploring the basics of atomic structure using the theme of the Addams Family. (MKR)