Educational audiobook for children to learn the layers of the earth: the atmosphere, the biosphere, the hydrosphere, and the geosphere. The atmosphere is the earth's outermost layer and is divided into 5 different parts of the outermost layer: the troposphere, the stratosphere, the mesosphere, the thermosphere, and the exosphere. Below that are two other layers: the biosphere and the hydrosphere. The biosphere is the layer where living things and ecosystems are found (forests, jungles, savannah, desert or tundra). The hydrosphere is composed of water and covers three-quarters of the planet. Finally, the Earth's inner layer is the geosphere, which is divided into the crust, the mantle, and the core.