Classificação da Biblioteca do Congresso dos EUA (LCC)QE

animals(2,263) archaeology(639) biography(966) biology(2,282) birds(237) California(463) chemistry(155) children(1,071) children's(1,726) children's literature(230) climate(217) climate change(256) Creation(364) creationism(194) dinosaur(1,217) dinosaurs(17,080) disasters(251) early reader(215) earth(1,596) easy reader(254) ecology(400) educational(184) elementary(148) environment(569) evolution(2,710) extinction(531) general science(124) geography(1,329) geology(15,809) Grade 2(137) green(147) guide(293) guidebook(435) history(4,458) history of science(819) ice age(353) informational(795) juvenile(497) juvenile literature(176) juvenile non-fiction(350) kids(396) life science(158) mammals(266) mammoths(165) maps(337) National Parks(135) natural disasters(490) natural science(395) nature(2,627) New Mexico(254) North America(192) paleobiology(88) paleogeography(39) paleontologists(96) photographs(192) picture book(1,897) pop-up(360) popular science(352) prehistoric(534) prehistory(717) reference(2,332) reptiles(352) school(215) science(20,781) science and technology(103) science nonfiction(181) scientists(133) stones(91) travel(748) usa(439) volcanoes(2,635) weather(329) Wyoming(150)