The concept of equilibrium vapor pressure plays a key role in the general chemistry curriculum; it is among the first and most easily demonstrated examples of equilibrium and frequently caps off the first semester of general chemistry where it illustrates the properties of liquids and intermolecular forces. We report here simple modifications of…

Most laboratory activities conducted by students involve measurement, and measurement can only be as precise as the instrument with which it is made. When Julia Metz began her teaching career, she assumed most of the 10th grade chemistry students would have previously used common measuring devices such as metric rulers, graduated cylinders,…

This study aims to design a mechanism with which the density of any solid or liquid can be determined without measuring its mass and volume in order to help students comprehend the concept of density more easily. The "solidensimeter" comprises of two scaled and nested glass containers (graduated cylinder or beaker) and sufficient water.…

Chemistry laboratories ordinarily involve a number of visual observations and require qualitative and quantitative explanations of these observations. A student with blindness at Truman State University successfully completed the laboratory portion of the non-majors liberal arts chemistry course with the assistance of a senior undergraduate…

An inquiry-based laboratory exercise is described in which introductory chemistry students measure the density of water five times using either a beaker, a graduated cylinder, or a volumetric pipet. Students are also assigned to use one of two analytical balances, one of which is purposefully miscalibrated by 5%. Each group collects data using…

Problem Statement: It is unknown how Science Teacher Candidates (STCs) recognize measuring instruments and indicate units that STCs will teach to their students, which they will constantly come across when they become teachers. Determining this case is important because it is believed that the results of this study will support the implementations…

An attempt is made to find a solution to the occasional problem of a need for storing large numbers of graduated cylinders in many teaching and research laboratories. A design, which involves the creation of a series of parallel channels that are used to suspend inverted graduated cylinders by their bases, is proposed.

Describes the construction of a vernier scale made of chart paper that can be used to improve the readability of scales on burettes or graduated cylinders. (JRH)

Provides procedures for a simple laboratory activity on exponential growth and its characteristic doubling time. The equipment needed consists of a large plastic bucket, an eyedropper, a stopwatch, an assortment of containers and graduated cylinders, and a supply of water. (JN)

Describes an interdisciplinary unit for upper elementary students that integrates science, geography, history, and mathematics in the study of spoons. Students determine the volume of each spoon by submerging it in a graduated cylinder of water and measuring the difference in water levels before and after submersion. Shows students that scientific…

This document is an instructional module package prepared in objective form for use by an instructor familiar with the azide modification of the Winkler dissolved oxygen test and the electronic dissolved oxygen meter test procedures for determining the dissolved oxygen and the biochemical oxygen demand of a wastewater sample. Included are…

A SCIENCE UNIT ON MEASUREMENT IS PRESENTED. INCLUDED ARE AN INTRODUCTION TO THE METRIC SYSTEM AND SOME TOOLS OF MEASUREMENT. STUDENTS ARE GIVEN A HOMEMADE SYSTEM OF MEASUREMENT WHICH UTILIZES A GRAIN OF RICE AS ITS BASIC UNIT. THE STUDENTS ARE GIVEN EXPERIENCES WITH THE METRIC SYSTEM. THROUGH THESE EXPERIENCES, THE STUDENTS SEE THE NEED FOR…

Seychelles Integrated Science (SIS), a 3-year laboratory-based science program for students (ages 11-15) in upper primary grades 7, 8, and 9, was developed from an extensive evaluation and modification of previous P7-P9 materials. This P7 SIS unit is designed to: (1) introduce students to and familiarize them with working in the school laboratory;…

The study was designed to determine how standard science skill builder activities can be modified or adapted for use by orthopedically handicapped students. Nine secondary level science experiments were selected for initial review and from these, three were selected for adaptation--use of the microscope, use of graduated cylinders, and use of the…

ELEMENTARY SCHOOL PUPILS' ABILITY TO USE EVIDENCE FROM SCIENTIFIC INSTRUMENTS WAS DETERMINED. THE 320 PUPILS FROM GRADES ONE THROUGH SIX WERE PLACED IN DECISION-MAKING SITUATIONS REQUIRING THEM TO USE EVIDENCE FROM A PLATFORM BALANCE OR GRADUATED CYLINDER. PUPILS WERE REQUIRED TO DIFFERENTIATE BETWEEN MASSES OR VOLUMES OF PAIRS OF OBJECTS. THE…