Describes air observation activity in which human fingerprints are investigated. Includes diagrams of various fingerprint types and the characteristics of various fingerprint ridge types. (SL)

Many experiments can be conducted in spring and early summer when many of the flowering plants must hurriedly bloom before the leafage of the trees and bushes takes most of the needed sunlight away. (DF)

An experiment involving the preservation of mouse kidney cortex and liver tissues is set up to evaluate the relative tonicity of fixatives. (DF)

The function of filters in various situations is discovered through activities with common objects, machines, and organisms. (DF)

Describes elementary school activities and questions which center on the life cycle of the woolly bear caterpillars. (MLH)

Describes activity relating to the study of trees. (SL)

Describes a number of activities relating to the observation and study of trees. (SL)

Provides a set of plans for constructing a plant incubator for the classroom. Illustrations are provided as well as lists of materials and tips for rearing the plants. (SA)

Suggests that ecology clubs utilize skin or scuba diving techniques to do ecological research. (LS)

Discusses the three phases of a three-day intensive research study field trip: planning and pre-trip training; actual trip; and post-trip report, research and data organization, and final trip evaluation. Included is a sample program of the limnology field trip taken by the Grafton High School, Wisconsin. (CC)

Describes the construction and use of a shell-discovery kit for students to employ in actively investigating the natural world. (WRM)

Describes an inquiry appraoch in which tree growth-ring analysis is used to determine the age of a tree, trace flood history, and investigate environmental effects on tree size. (MLH)