How is your forearm like a lever? * What makes it easy to pull a flag up a flagpole? * How can a windmill help to do work? Janice VanCleave's Machines includes

The perfect science fair idea books . Spectacular Science ProjectsJanice Vancleave's Electricity * How do you make a battery out of a lemon? * Can a magnet prod

How do plants make their own food? Why do the different strings on a guitar have differentsounds? What does the color of a star tell you about how hot the stari

The perfect science fair idea books ... Spectacular Science Projects Janice VanCleave's Weather Why does it rain? What causes thunder and lightning? How does a