Don't be so dense that light bends around you; study the relationship between mass and volume instead. Young chemists measure the density of a variety of liquids and solids. A reading passage and analysis questions introduce pupils to...

This site from General Chemistry Online provides a mnemonic device you may not have seen to help remember the rules for significant digits called the Atlantic-Pacific Method. Also includes a comparison between this rule and the...

With the subtitle, "stuff you should know before delving too far into Chemistry," this site examines a range of six topics to provide the user with a broader understanding of chemistry.