Earth's Layers

This picture book introduces early readers to Earth as a terrestrial planet, a world built mostly from rock. Its surface combines rock, soil, oceans, and land. Beneath that surface, Earth is generally understood to have three main layers: the crust, the mantle, and the core. The crust is the thin outer shell and consists of rock, minerals, and soil. The mantle lies under the crust, where the upper part is solid and rocky while the lower part is molten. The core sits at the center and is most likely composed of iron and nickel. Scientists cannot observe the deep interior directly, so they learn about it by studying earthquakes and volcanoes. A pronunciation guide is included. The 24 pages are filled with bright, colorful illustrations. Recommended reading level is 1 to 3, and interest level is 2 to 5.