In Frontiers Book 3: Geology, Astronomy, and Environment, students will explore many different types of frontiers found within the broad concepts of geology, astronomy, and the environment. Students will investigate questions such as "What is the rock cycle?" "What is plate tectonics theory?" and "Who was Alfred Wegener?" Once students begin to understand the forces at work on our own world, they examine research taking place to land the first man on Mars. By studying the Flashline Mars Research Station and the effects of near zero-gravity on mammals, students will have a better understanding of just how daunting of a task it will be to someday land on the red planet. This book also looks at what is being done to conserve the natural resources on our planet.