Two online textbooks in one!
Geography for kids by KidsGeo.com (purple pages)
An indepth online geography textbook with nine chapters written for kids. Learn about the world around you. Geography is the study of the Earth focusing on the surface, the atmosphere, the oceans, as well as the distribution of plants, animals, and people. Includes Geography Games.
Geology for kids by KidsGeo.com (green pages)
An indepth online geology textbook with five chapters written for kids. Learn about the world beneath you. Geology is the study of the Earth’s surface and substructure. Geologists look at the processes that form terrain, and the processes that destroy terrain. Includes Geology Games.