Clasificación de la Biblioteca del CongresoQC350-467

art(58) astrophysics(14) big book(10) biology(14) body(7) brain(11) chemistry(85) children(44) children's(62) children's literature(11) consciousness(31) cosmology(36) cosmos(6) cultural history(14) dark(16) digital(11) discovery(7) early reader(10) earth(9) easy reader(9) education(15) energy(57) engineering(28) esoteric(8) essay(8) experiments(108) fire(6) general science(27) glass(10) Grade 2(6) history(97) history of science(67) how things work(5) how-to(9) illusion(6) informational(28) informative(5) inventions(6) invisibility(5) Isaac Newton(13) juvenile(15) juvenile non-fiction(14) kid(6) kids(16) light(726) math(56) metaphysics(34) mind(14) mirror(8) mirrors(62) moon(15) mysticism(15) natural science(22) nature(44) Newton(16) northern lights(11) perception(12) philosophy of science(5) photographs(10) photography(27) physique(5) picture book(143) popular science(28) preschool(10) primary(13) projects(5) psychology(22) puzzles(6) quantum(11) quantum mechanics(33) quantum physics(49) reader(11) reality(10) reference(58) reflection(30) reflections(12) relativity(13) school(13) science(1,938) science and technology(7) science nonfiction(19) scientists(8) shadow(70) shadows(219) sound(20) speculation(5) stars(8) symmetry(5) tech(5) text(13) theoretical physics(6) time(13) universe(16) vision(23) weather(45)