Two easy student activities that demonstrate physical weathering by expansion are described. The first demonstrates ice wedging and the second root wedging. A list of the needed materials, procedure, and observations are included. (KR)

Presents two exercises in astronomy: (1) the production of star trails and (2) the measurement of the distance between stars and their apparent movement in the sky. Includes directions, illustrations, and activity questions. (MA)

Explains the arrangement of materials in a classroom to simulate land or weather conditions. On each desk in the room pertinent bits of information are placed. Students gather bits of information and synthesize material into an overall map of the area. (CP)

Reports the results of a study of four different instructional methods used in teaching earth science at the sixth grade level. The objective of the study was to compare the effectiveness of the didactic approach with the process-managerial, the self-directed, and the motivated self-directed learning methods. (JR)

Presents a reproducible page for students dealing with the following topics: plate tectonics, magma, crust, and earthquakes. Provides a plate tectonics activity that uses cardboard and clay. (PR)

Describes a lab investigation designed to introduce students to soil compaction and help them to learn to design and adapt procedures that scientists use when they plan and conduct controlled investigations. Provided are objectives, a list of materials, procedures, and a sample student handout. (CW)

Describes a demonstration to show the character and behavior of mixing clouds. Discusses laminar and turbulent flow, and the formation of contrails and other cloud phenomena. (CW)

Describes several activities which can be used, by the teacher, as class demonstrations or projects to stimulate student interest in weather phenomena. (JR)

Presents activities for the fossilization process by using rust prints to simulate fossils. Photographs illustrate the procedures described. (HM)

Presents activities to familiarize junior high school students with the processes behind and reasons for volcanism, which is generally a planet's way of releasing excessive internal heat and pressure. Students participate in the creation of four important volcano-related simulations: a lava flow, a shield volcano, a cinder-cone volcano, and a…

Integrates science and social studies in several activities that study weathering caused by the freezing and thawing of rocks, wind erosion, and the effects of weathering on tombstones. Cites the possibility of these activities leading to an interdisciplinary exploration of pollution, customs, and populations. (MCO)

Provides a lesson plan with student worksheet for teaching the concept of geologic time to middle school students. The lesson is cited as representative of an Earth systems approach to science curriculum with emphasis on the age of the earth and the fact that its subsystems are constantly evolving. (MCO)

Presents two activities for introducing the topic of carbon dioxide: (1) Investigating Some Properties of Carbon Dioxide and (2) Building a Carbon Dioxide Generator. (PR)

Describes a project where students were involved in finding the most suitable site for a landfill in their community. This two-month project was conducted using team teaching. Two twelfth grade geoscience classes were involved. (PR)