Cloze: Complete the paragraph by filling in the missing terms.

14. The Ocean Floor: The Continental Shelf (C98)

Around the edges of the continents, a shallow area called the continental shelf extends into the ocean for about 80 km (50 mi). It is no deeper than 140m (about 460 ft), although it varies in width from 1.6 km (1 mi) to 1200 km (about 745 mi) in the arctic regions.

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