Experimenting

This document describes several activities to teach students about experimentation and identifying variables. The activities explore evaporation, solubility, dissolving, acids, alkalis, temperature, pressure, springs, and friction. For each activity, the document identifies the manipulated variable, responding variable, and any constant/controlled variables. It also provides examples of how to operationally define scientific terms based on experimental observations and measurements. The overall purpose is to help students learn about experimental design and identifying the key variables in experiments.