CJKN+5.4

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Vocabulary:
Coral reef:A structure of calcite skeletons built up by coral animals in warm, shallow ocean water. Atoll:A ring shaped coral island found far from land.

Outline

 * living coral
 * algae
 * sack with tenticals
 * how coral reefs form
 * calcite skeletons
 * fringing reefs
 * barrier reefs
 * atolls
 * limestone deposits from coral reefs
 * coral buried by sediment