CHEMISTRY

• Interactive Periodic Table (on popsci.com)
• Atoms, Molecules and Ions
• Chemical Elements (good source)
• Chemicool (Periodic Table)
• Periodic Table of the Elements
• Chem4Kids: Elements
• WebElements
• ThinkQuest: Periodic Table--Chem 101
• The Pictorial Periodic Table
• The Chemistry of Fireworks
• The Chemistry of Sunscreen

SIMPLE MACHINES

• Edhead - Simple Machines Activities
• Spotlight on Simple Machines (Everything you ever wanted to know about Simple Machines. Demonstrations and graphics.)
• Simple Machines - Levers and Gears
• Mechanisms and Simple Machines (explanation of how things work)
• J and J Simple Machines (Webquest)
• Simple Machines for Elementary Students