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(4)
4-6
Big Countdown series.
Facts about the human body and its many parts are presented in terms of numbers, such as the amount of cells, hairs, bacteria, and bones; the time it takes to digest food or grow a baby; and the sizes of all the various organs. All these facts are crammed onto colorful but busy layouts, along with illustrations and a few photographs. Reading list, websites. Glos., ind.
(4)
4-6
Big Countdown series.
Facts about geology and geography are presented through numbers that measure them, including topics such as atmospheric temperatures and geographic distances; geologic time; the lengths of rivers and depths of the ocean; and the amounts of sand, water, and people on earth. Each crowded two-page spread is filled with colorful illustrations of the features and a few small photographs. Reading list, websites. Glos., ind.
(4)
4-6
Big Countdown series.
An emphasis on numbers frames this presentation of the classification of animal life. The crowded layouts, illustrated with colorful graphics of animals and a few small photographs, use numbers to highlight facts such as the ages and sizes of species, distances that some animals migrate, numbers of offspring, and the like. The facts are interesting, although sometimes arbitrary. Reading list, websites. Glos., ind.