Explore the land, water, and sky with the Junior Scientists series for kids ages 6 to 9 Have you ever wondered what makes the weather change? Or how mountains, rivers, and valleys get their shapes? Answer these questions and more with Planet Earth for Kids! You'll explore how our planet became the perfect home for all its plants and animals and how our air, sun, water, and dirt make planet Earth unique. Photos and illustrations—Beautiful pictures and fascinating diagrams let you take a peek at everything from penguins and storm clouds to the different types of rocks. Facts and activities—Discover what causes volcanoes, how much salt is really in the ocean, and even how to build your own solar-powered pizza oven! Earth ecosystems—Learn about the different biomes and habitats all over planet Earth and the plants and animals that work together to keep them healthy. Find out what keeps all life on Earth in balance with Planet Earth for Kids.