Chemical Foundations 

Dr. Ott's Video Lectures

Chapter 1

Basic Chemical Defiinitions 12 min flash google video
Numbers, SI Units and Scientific Notation 10.5 min flash google video
Significant Figures 11 min  flash google video
Unit Conversion and Density  15 min flash google video

WebPages

Metric System

Metric conversions

Accuracy Precision

Scientific Notation

Significant Figures

Significant figures in Calculations

Dimensional Analysis

Thermometry and Temperature Conversions

Density

 Classifying Matter