Earths Oceans Ocean Graphic Organizer On your concept

Earth’s Oceans

Ocean Graphic Organizer • On your concept map, list as many connections to the oceans that you can think of.

Ocean Essential Standards • EEn. 2. 3 Explain the structure and processes within the hydrosphere. • Essential Questions: • What features exist on the ocean floor? How do these relate to erosion and plate tectonics?

Quick Quiz 1. false 2. The ocean is a big, flat featureless plain. True or False The steep part where the continental shelf slopes down to the deepest part of the ocean is called the continental slope. True or False true

3. What are the deepest parts of the ocean called? a. Trenches b. Abyssal plains c. Continents d. Seamounts Deep sea trenches 4. What is a seamount? a. A scientist who studies the ocean floor b. Deep-sea trench c. A fancy seagull d. A volcano that formed over a hot spot on the ocean floor. D

Why call it “Earth” if…. nearly 71% of the Earth’s surface is covered by oceans?

How Many Oceans Can You Name?

Answers 1. 2. 3. 4. 5. Pacific Atlantic Indian Arctic Southern

How Do We Know the Ocean Topography? Main Features

Ocean Exploration • Submersibles - Bathysphere vs. Bathyscaph • SONAR – Sound Navigation and Ranging

Bathysphere vs. Bathyscaph

Sonar Sound waves are bounced off the ocean bottom and timed as they arrive. Formula: Distance = Velocity of Sound X Time

Sonar Technology Today Modern multi-beam radar

Satellites are also used

Bathymetry = The study of the oceans topography

Parts of Ocean Floor • • Continental Shelf Continental Slope Continental Rise Submarine Canyon Trenches Abyssal Plain Mid-Ocean Ridges Seamounts, Guyots Continental Margin

The Continental Margins

Continental shelf • “The Beach Part”

Continental slope • When you can’t feel the sand under your feet

Submarine Canyon

Trench • Sea floor depressions

Abyssal Plains Extremely flat sediments.

The Mid-Ocean Ridge • • • Seafloor spreading Divergent plate – new ocean floor Recall – Ridge push and slab pull!

*Sea Mount v. Guyot • Underwater mountain vs. Flat Mountain

What is their connection? • Plate tectonics pushes volcano to surface • Top erodes • Ridge push moves them along

Other Terms: Hydrothermal Vent • Hydrothermal vent = fissure, creates geothermal energy or chemosynthesis for deep sea bacteria (extremophiles)

What else is on the ocean floor? • Silaceous and Calcareous Ooze (Shell Deposits)

Review Questions • Name 3 ways Scientist know what is on the ocean floor. • What is the difference between a bathyscape and a bathysphere? • What is a/the…. continental shelf…. continental slope…abyssal plain…. trench? • What is the connection between a seamount and guyot? • How does plate tectonics impact the ocean floor?