Lesson 23 Laurel Springs Textbook Earth Science

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Lesson 23 Figure 11 coarse nearshore deposits and fine clay. Continental shelf, while fine sediments cover the sea floor. Calcareous ooze Siliceous ooze Coarse nearshore deposits. Section 14.3 Three types of seafloor sediments, biogenous sediment, and hydrogenous sediment. Terrigenous sediment consists of mineral grains that have been routed from continental rocks and then transported to the ocean. Biogenous sediment consists of shells and skeletons of marine animals and algae. Hydrogenous sediment is formed when minerals crystallize from ocean water through chemical reactions. 14.4 The main energy resources from the ocean natural gas. Gas hydrates are formed when bacteria breaks down organic matter that is trapped under ocean floor sediment. There is a large possibility of leaks and spills during the drilling process. Other resources derived include sand, gravel, evaporative salts, and manganese nodules. Evaporative salts are used for table salt, seasoning, and preserving as well as clothing dyeing fabrics and de-Ice roads in agriculture. Manganese nodules are hard lumps of manganese and other metals that form around a small object. It is difficult to obtain because, sites are limited, it is difficult to get mining rights, there is also environmental concerns. 14 assessment D D B B C The blue planet because most of the planet is covered with water A continental shelf gently slopes and is submerged surface extending to the shore. They contain minerals, oil, natural gas and gravel. Which makes them significant to economies. The Pacific ocean, because the plates plunge beneath the mantle in this area. Hydrogenous sediment is formed when minerals crystallize in ocean water due to many types of chemical reactions. They come from trenches and shelves. They are used for making concrete. When the ocean ridge spreads the seafloor

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