How does the Moon's appearance change as seen from Earth? Can sand help clean our planet's drinking water? How can you find your latitude? How can you accurately map an outdoor area? Our planet is a great place to start experimenting! The simple projects in this book will help young scientists begin to understand Earth, including its place in the solar system, its atmosphere, its only natural satellite--the Moon, and its resources and geology. For students interested in competing in science fairs, the book contains lots of great suggestions and ideas for further experiments.