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Eri Luna (:

food chain

Sea World : Coral Reefs

1.The largest atoll, named Kwajalein, surrounds a lagoon over 60 miles (97 km) long.

2.Hard corals build by secreting calcium carbonate skeletons.

3. 1.Fringing reefs are commonly found in the South Pacific Hawaiian Islands, and parts of the Caribbean. 2.Barrier reefs form when land masses sink, and fringing reefs become separated from shorelines by wide channels.

The World's Biomes

1. Fresh water and marine biomes 2. Desert areas are defined as those regions with less than 250 mm (10") of rainfall per year, or with a net loss of water due to evaporation. This includes about 10% of the Earth's total surface, or about 33% of the Earth's //land// surface 3. The Arctic tundra is a treeless area between the icecap and the tree-line of Arctic regions, having a permanently frozen subsoil and supporting low-growing vegetation such as lichens, mosses, and stunted shrubs. The Alpine tundra is large, flat or gently sloping, treeless tracts of land above the timberline.