They can be quite scary, but volcanoes and earthquakes are fascinating, natural occurrences on Earth. Readers will learn about earthquakes and volcanoes--the way they're measured, their sizes and shapes, their eruptions--and much more in this intriguing book Tsunamis, hot springs, and geysers are also explored, as readers will be able to further their knowledge of earthquakes and volcanoes, both often a result of moving rocks. Vivid illustrations,...