In this article, physical quantities related to the motion of a parachute system in the framework of Newton's law of mechanics guide an informal approach to the mathematical concept of function. Furthermore, a graphical simulator that enables visualization of the fall of object-parachutes system is presented. The article is aimed at students and…

This book discusses four kinds of graphs that are taught in mathematics at the middle school level: pictographs, bar graphs, line graphs, and circle graphs. The chapters on each of these types of graphs contain information such as starting, scaling, drawing, labeling, and finishing the graphs using "LogoWriter." The final chapter of the…

Described is a simple electronic interface that can receive signals from up to four analog sensors and four event detectors and save the data on disk. Schematic diagrams, construction details, sample temperature plot and weather station logging programs, and a parts list are included. (KR)

This document was designed to be used as a tool to assist students with research-oriented science projects. It provides a step-by-step approach to the development of such projects addressing: (1) selecting a research topic; (2) learning about the subject; (3) developing a specific purpose for the research; (4) planning the project; (5) initiating…

This document contains an instructional unit which deals with one major topic in ecology. It focuses on the variables which affect the development of populations and determine their final size within a given period of time. The variables operating in nature which determine the development of populations are numerous, thus complicating the task of…