(Encyclopedia) Arches National Park, 76,519 acres (30,979 hectares), E Utah; est. as a national monument 1929, designated a national park 1971. Located in red-rock country and overlooking the gorge…
(Encyclopedia) TiruchirapalliTiruchirapallitĭrˌ&oobreve;chĭrəpŭlˈlē [key], formerly TrichinopolyTiruchirapallitrĭchĭnŏˈpəlē [key], city (1991 pop. 711,862), Tamil Nadu state, SE India, on the…
(Encyclopedia) Pennebaker, D. A. (Donn Alan Pennebaker), 1925–2019, pioneering documentary filmmaker, b. Evanston, Ill. His first film, Daybreak Express (1958), is a five-minute short detailing New…
Twenty Years of Fact Monster
About Us
Education is a top priority for parents and teachers. We know that learning happens outside as well as inside the classroom, and we understand that parents…
Bones are made of a network of calcium laid down by cells. As kids grow, special cells at the end of bones add new calcium to the network of bone. Children have layers of these cells in the shape…
(Encyclopedia) concretion, mass or nodule of mineral matter, usually oval or nearly spherical in shape, and occurring in sedimentary rock. It is formed by the accumulation of mineral matter in the…
(Encyclopedia) talustalustāˈləs [key], deposit of rock fragments detached from cliffs or mountain slopes by weathering and piled up at their bases. A talus is a common geologic feature in regions of…
(Encyclopedia) quartzite, usually metamorphic rock composed of firmly cemented quartz grains. Most often it is white, light gray, yellowish, or light brown, but is sometimes colored blue, green,…
