How are mountains formed? What makes the air we breathe? What causes the ocean waves? Now you can learn the answers to these and other questions about the Earth, sea, and air through this collection of 101 fun, safe, low-cost, hands-on experiments and activities. For example, you'll make a peanut butter and jelly sandwich to understand sedimentary rock formation. Each experiment includes step-by-step instructions, expected results, and an easy to understand explanation. 1991, 231 pages, 6" x 9", soft cover.