Corals 0.0 / 5 ? GeologyCoralsA2/A-levelOCR Created by: Isabelle19Created on: 20-05-17 11:34 5326714 Across 1. Yes but between 30-4 parts per thousand (2, 4, 4, 8) 4. Anthozoa (5) 5. They do not have an anus so undigested material and waste is removed through the mouth (3, 2, 5, 7) 6. Soft bodied organism that secretes a calcium carbonate skeleton (4, 2, 1, 5) Down 2. Ring shaped reefs found offshore, the formation of atolls is due to hot spot activity as the volcanoes create an area of shallow sea, the weight of the volcano means the crust gradually sinks and the moho sags below the shield volcano (4, 2, 1, 5, 5) 3. Fringing reefs meet the land and some parts may be above sea level at low tide (4, 2, 1, 8, 4) 7. Cnidaria (6)
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