Coral Reefs: An english compilation of Activities for middle School Students

Abstract

The breathtakingly beautiful coral reefs of the world cover less than a half of one percent of our planet's sea floor. And yet, these magnificent underwater empires are home to an estimated 25 percent of all oceanic species, a dazzling diversity of sea creatures. Like the teeming metropolis of Rome, a coral reef "was not built in a day."Rather, the coral heads in a reef grow at a painstakingly slow average rate of half an inch per year and require epochs of geological time to amass into reefs and coral cays.Coral reefs, in addition to providing food and shelter for countless varieties of marine life, provide benefits beyond estimation for humankind. Healthy reefs aree ssential for an adequate supply of seafood to nourish the world's populations and sustain regional fishing industries. Reefs enhance tourist businesses by attracting millions of divers and by continuously supplying coastal beaches with shimmering white sand, the fine-grained rubble of dead corals and calcareous reef algae. By breaking waves, reefs protect nearby shorelines from soil and sand erosion and from the brunt of ravaging hurricanes. A wealth of commercial and medical applications has been discovered for corals and other components of the reef community. From coral reefs come additives for cement and mortar, compounds used in violin varnishes, substances for surgically replacing broken human bones, and promising treatments for infections,viruses, arthritis, asthma, and cancer. Scientists agree that this is only the tip of the iceberg as far as important findings and innovations which will result from continued research of coral reefs.