PPT-The Ocean Floor Seeing by SONAR

SO und N avigation A nd R anging A ship sends sound waves to the ocean floor The sound waves bounce off the floor and back to the ship The deeper the water the longer it takes for the sound waves to return. Ocean Zones. Which Zone?. 1. Each . group. . will be given a set of words that relate to the different zones of the ocean.. 2. At your table you will . try and place . your words in the correct zone.. Ms. Bridgeland . 6. th. Grade. Why have people been interested in using the ocean since ancient times?. 3 Major . R. easons. 1) Ocean provides . FOOD. 2) Serves as a route for . TRADE. . 3) Is a way to . Check your notes for . key ideas!. 1. Mid-Ocean Ridges.  . . An . underwater mountain . range stretching all over Earth.. . Scientists . used sonar to map the ocean . floor. Mapping the mid-ocean ridge made scientists more curious about what is happening . Chapter 14 . pg. 393. A. The Vast World Ocean. The blue planet. 71% of earth is covered by ocean. Oceanography – study of the ocean. Geography of oceans. 4 main ocean basins. Pacific Ocean. Largest ocean. Features of the Ocean Floor. Continental Shelf. Zone . of shallow water where the ocean covers the end of the continent. . Shallow slope. Where most ocean life is found. Why?. Answer: Photic zone is the first 100 feet of water and allows sunlight to penetrate the water. . 20.3. Seafloor sediments. Ocean . floor is mantled with sediment. Sources. Turbidity . currents. Sediment . that slowly settles to the . bottom from . above. Thickness . varies. Thickest . in trenches – accumulations . 8 September 2014. Tallest Mountain on Earth. Mauna Kea Mount Everest. Seafloor is Dynamic. Mariana Trench: deepest part of the ocean (11,000m). Average ocean depth ≈ 3,700 meters (m). Seafloor is Dynamic. http://www.youtube.com/watch?v=3GRA7ilM708. Difficulty in exploring the ocean. Sunlight does not penetrate far below the surface. . Water is very cold. . Tremendous pressure. . Technology Used To Study Ocean Bathymetry. Lead line mapping. Lead line mapping was the earliest form of seafloor mapping; this technique was used in ancient Egypt.. A rope with a weight on the bottom was marked at different “fathoms” and dropped overboard until it hit the sea floor.. By: . Rishon. Pryce, Kaylee French. Period – 6. 09/21/15. Sonar.. The definition of sonar is:. Sonar (an acronym for sound navigation is a way to use sound . to navigate, . communicate . or detect objects on or under the surface of the water, such . Plate tectonics review. Earth’s lithosphere is divided into large tectonic plates. They are constantly in very slow, motion.. Plate tectonics review. ____________ pushes the tectonic plates apart in sea floor spreading. This causes the motion of the plates.. Submersibles, satellites, and other technology allow scientists to study the structure and composition of the ocean floor.. a. system that uses transmitted and reflected sound waves to measure distances to the ocean floor; SONAR. Ocean . Floor Features. When we look across the ocean, we see miles and miles of water. However, if we were to look under all this water, we would see many geological features that look very similar to those found on land.. Section 4. Standard . S 6.1 Students know evidence from plate tectonics is derived from the fit of the continents and mid ocean ridges. . Vocabulary. Mid-ocean ridges. Sonar. Sea floor spreading. Deep ocean trench.