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Ocean Bottom

Ocean Bottom . Chapter 3. Will lead to unlocking some of the mysteries of the ocean and may give insight into Earth’s past. Bathygraphic features. Underwater physical features Mountain ranges Canyons Valleys. Two Major Features of the Ocean Bottom. The Continental Margins

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Ocean Bottom

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  1. Ocean Bottom Chapter 3

  2. Will lead to unlocking some of the mysteries of the ocean and may give insight into Earth’s past

  3. Bathygraphic features • Underwater physical features • Mountain ranges • Canyons • Valleys

  4. Two Major Features of the Ocean Bottom • The Continental Margins • The region beneath the ____________zone • The Ocean Basin • The _____________of the ocean beyond the continental margin

  5. Continental Margins • The continental shelf • Shallow submerged_____________________ • The continental slopes • __________________between the continental shelf and the deep floor of the ocean

  6. Continental Margins continued • Submarine Canyons • Probably formed by _________on land during periods of_________________ • Continental Rise • A gentle slope at the base of a steep______________________

  7. Ocean Basin • Four main ocean basins • Pacific • Atlantic • Indian • Arctic • Antarctic (also considered to be an ocean)

  8. Geological formations found in Ocean Basins • Abyssal Plains and Hills • _____________- flat expanse of the ocean basin • ______________ – as high as 1,000 meters (3,300 feet) • Seamounts • Formed from underwater_____________ • Found mostly in the Pacific Ocean

  9. Geological formations found in Ocean Basins cont. • Ridges and Rises • A continuous series of large, underwater, volcanic mountains runs through every ocean of the world • Trenches – most common in the Pacific Ocean • Mariana Trench • The deepest of all ocean trenches – The _____________________is 11,020 meters (6.85 miles) deep. The deepest spot on earth • Island arcs • Chains of volcanic islands usually associated with trenches

  10. the mid-ocean ridge is the largest single geological feature on the Earth's surface. the Mid-Ocean Ridge is an underwater series of mountain ranges that snakes 40,000 miles (64,000 kilometers) around the globe, from the Arctic, through the Atlantic Ocean, the Indian Ocean and across the Pacific Ocean. the highest peaks rise ____________feet (3,000 meters) above the sea floor.

  11. Life on the Ocean Floor • Continental Shelf • Shallow • Sunlight________________________ • High levels of _________________wash in from the continent • High levels of ________________and nutrients makes the area very productive and marine life is __________________on the continental shelf

  12. Life on the Ocean Floor cont. • Abyssal Plain • Deep water • No sunlight, no__________________ • Food production is by way of _______________________bacteria in vent communities • Life is not abundant on the ocean floor because____________________________

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