The student will investigate acids and bases in the world about them. Explains how substances are placed in categories according to their characteristics. Identifies properties of acids and bases, and describes their harmful effects. Describes methods of identifying acids and bases, and identifies common ones.

Introduction: Beware the snottites! -- Acids and bases: they're everywhere -- Picture this: don't mess with Mother Nature, acids and bases in the natural world -- Reading the clues: acid or base? -- Chemistry in action" putting acids and bases to work -- Thinking like a scientist: predicting -- Hands-on science: what's the pH of your soap? -- Science notebook -- Glossary.