* Your assessment is very important for improving the workof artificial intelligence, which forms the content of this project
Chapter Seven: Oceans • 7.1 Introduction to Oceans • 7.2 Waves • 7.3 Shallow Marine Environments • 7.4 The Ocean Floor 7.4 The Ocean Floor • Many of the important features of the oceans are hidden in deep water. • The continental margin is the region around continents that includes the: – continental shelf, – continental slope, and – continental rise. 7.4 Features of the ocean floor • Maps can show the location of the continental shelf (light blue areas). • The true ocean floor is called the abyssal plain. (dark blue) • It is flat and smooth because a thick layer of sediment covers its features. 7.4 The deep ocean floor • A barrier island is a low, sandy island that lies parallel to the shoreline. • A bank is a low, flat region on the continental shelf. • A seamount is a steep-sided mountain that rises from the ocean floor. 7.4 The deep ocean floor • A guyot is a seamount that has eroded so that it has a flat top and is underwater. • Mid-ocean ridges mark places where two tectonic plates are separating and new ocean crust is being made. • Deep-ocean trenches are the deepest parts of the ocean. Water Safety Connection Rip Currents • Rip currents can cause a swimmer to be pulled out to sea. • A rip current forms when water piles up near the shore and moves away from the shore all at one time. Activity Circumnavigating the Globe • You will plot a sailboat route for circumnavigating the globe from the coast of Massachusetts to the coast of California.