A learning unit about earthquakes includes activities for primary grade students, including making inferences and defining operationally. Task cards are included for independent study on earthquake maps and earthquake measuring. (CB)

A brief lesson is presented on ways in which things become clean or are cleaned. Two hands-on experiments are described: one in which students learn to sequence, and the other in which students learn about the differences between fact and opinion. (CB)

A hands-on science activity, which calls for students to perform a physical checkup on a local tree, is described. A reproducible worksheet, "A Tree's Annual Checkup," is included. (IAH)

A discussion of TV weather forecasting introduces this article which features several hands-on science activities involving observing, researching, and experimenting with the weather. A reproducible worksheet on the reliability of weather forecasts is included. (IAH)

Kite flying as a fun class project is proposed as a way of letting students apply what they've learned about air. A design for a kite made from a trash bag is provided, as are kite flying tips and resources. (MT)

The Grand Canyon, the natural wonder visited most often in the United States, is explored on foot, on burro, and by boat in this article. Learn about the canyon's different rock layers as well as its erosion, plant life, animal life, and water flow. (JM)

Presents science activities to help elementary children learn about water resources and home water conservation. A reproducible worksheet is included. (SJL)

Information on commercial fishing is provided, and a board game is described which requires students to watch for ocean signs of good fishing, choose equipment to catch specific types of fish, and consider effects of weather on working at sea. A reproducible copy of the game, with instructions, is included. (IAH)

Using the problem of trash disposal as an example, students participate in science activities designed to develop the following science skills: classifying, observing, measuring, communicating, inferring, and predicting. Activities are described in detail and a reproducible page is provided. (JL)

Describes independent and group research activities for the classroom focusing on the properties of air. (SS)

A number of hands-on science activities are suggested to acquaint children with the variety and properties of polymers. Common polymers are listed; individual and group activities are described; and a reproducible worksheet is included. (IAH)

This article provides information on the evolution of the building material, concrete, and suggests hands-on activities that allow students to experience concrete's qualities, test the heat absorbency of various ground surface materials, discover how an area's geology changes, and search for city fossils. A reproducible activity sheet is included.…

This science column includes background information, discussion questions, science activities, writing activities, and a bibliography on a different topic each month. The titles of the five installments included in this compilation are: (1) "Chameleons and Other Quick-Change Artists"; (2) "Niagara Falls and Other Super…

This article contains suggestions for introducing the scientific concept of matter and demonstration acids and bases using low-cost, collectible supplies. Sample questions and experiments are listed to help students explore these ideas. A list of household supplies to be used in the experiments is given. (DF)

This teaching unit on using shadows in science instruction and other class activities explains how to set up and equip a "super private sleuthing box" where students can solve mysteries such as where to find shadows and how to shrink or enlarge them. Ideas for making silhouettes and shadow plays are also given. (PP)