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)

Suggestions are provided for using animals (particularly snakes) as the focus of studies and activities in the science classroom. For example, cages with animals can serve as a learning center on various aspects of the animal. A list of suggestions for the care and feeding of snakes is provided. (JN)

Describes science activities related to Christmas and Thanksgiving, including identification of evergreen trees, tree shapes, pine cone and needle collections, edible decorations, and instructions for preparing bird food called "bird pudding." (SK)

Described is a praparium, a completely sealed and self-contained living aquarium. Steps on how to set up the aquarium, cautions, and a list of suggested aquarium plants and fish are included. (DS)

Describes the process of collecting and maintaining a culture of protozoa. Instructions are also given for constructing a micropipette for transfering small organisms. (SA)

Describes a physiology laboratory designed to localize digestive enzymes within the digestive tract of cockroaches and develop a general conclusion about the similarities to mammalian digestion. This approach not only demonstrates the practicality of lecture material, but also provides a springboard for independent research opportunities.…

Presented is an activity that uses ground ivy to display different growth forms under different light intensities. Specimen preparation, materials, procedures, and probable results are discussed. Examples of graphs of the data are provided. (CW)

Outlined is a procedure for the assessment of fungal growth under different cultural conditions, together with a demonstration of the toxic nature of exudates released from a fungal pathogen during growth in culture, using a simple bioassay. (Author/CW)

Described is an activity used to introduce the anatomy of the skeletal and muscular systems. A teacher conducted, video enhanced demonstration and a student activity are discussed. Included is a sample student laboratory paper. (CW)

Presents information on owl's taxonomy, characteristics, and influences on man. Describes owl pellets, which are digestive discards, and explains how they can be used to determine the owl's diet as a science activity. (PR)