AICE MARINE SCIENCE Past Papers type of plate boundary for a ocean trench ? Answer- convergent type of plate boundary for volcano ? Answer- convergent and divergent type of plate boundary for hydrothermal vents ? Answer- divergent type of plate boundary for earthquakes and tsunamis Answer- transform explain how tectonic processes lead to the formation of a tsunami. Answer- idea of pressure build up. earthquake or sudden slippage of plate. release of energy and large volume of water displaced.explain how tectonic process lead to the formation of a convergent underwater volcano Answer- one plate sinks under the other plate forming a subduction zone, pressure builds up and release, thin earths crust, magma erupts and the lava hardens to form rock.explain how tectonic process lead to the formation of a divergent underwater volcano Answer- plates pull away from each other and hot magma erupts, the lava hardens to form rock.describe the mutualism relationship between these algae and coral. Answer- coral provide protection for algae, coral provide carbon dioxide for algae, algae photosynthesize and produce carbohydrates for the coral and the coral eats the zooxanthella.explain why corals containing algae grow best in shallow waters with little to no sediments. Answer- algae need light for photosynthesis, abrasive action of sediments erode corals.outline the possible effects of a decrease in reef area on human coastal communities. Answer- increase in storm damage and waves increased flooding increased erosion damage to crops damage to buildings/infrastructure decrease in tourism decrease from harvesting/ fishing state what is meant by the word salinity Answer- total mass of dissolved salt in a unit volume of water.
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