Readers will learn about 100,000 tons (91,000 metric tons) of rock fall to Earth from space every year. The world's lightest rock is pumice. Contents: AV2 book code -- Studying rocks -- Earth and Moon rocks -- Rocks of different sizes -- Rocks and minerals -- Rock formations around the world -- The rock cycle -- Geodes and Gemstones -- The valuable uses of rocks -- What is a geologist? -- Rocks quiz -- Science in action.
Readers will learn that rocks are found all over Earth. The rock cycle is a process that recycles rocks from one type to another. AV2 book code -- Studying the rock cycle -- Shifting and drifting -- Rock groups -- Stress, hear, and pressure -- Rocks in the United States and Canada -- Weathering and erosion -- Sediments and fossils -- Rock recycling -- What is a geologist? -- Rock cycle quiz -- Science in action
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