1. Chapter 13
Section 2 The Ocean Floor
Bellringer
Pretend you have walked off the edge of North America and into the depths of the Atlantic Ocean. As you walk along the ocean floor toward Europe, what do you see? Draw the ocean floor as you imagined it.
Illustrate your answer in your science journal.

2. Chapter 13
Section 2 The Ocean Floor
Objectives
Describe technologies for studying the ocean floor.
Identify the two major regions of the ocean floor.
Classify subdivisions and features of the two major regions of the ocean floor.

3. Studying the Ocean Floor
Chapter 13
Section 2 The Ocean Floor
Studying the Ocean Floor
Seeing by Sonar Scientists use sonar to determine the ocean’s depth.
Oceanography via Satellite Scientists use images from the satellite Seasat to study ocean currents.
Studying the Ocean with Geosat Scientists use the Geosat satellite to measure slight changes in the height of the ocean’s surface.

4. Chapter 13
Section 2 The Ocean Floor

5. Chapter 13
Section 2 The Ocean Floor

6. Chapter 13
Section 2 The Ocean Floor

7. Revealing the Ocean Floor
Chapter 13
Section 2 The Ocean Floor
Revealing the Ocean Floor
Regions of the Ocean Floor The two regions of the ocean floor are the continental margin and the deep-ocean basin.
Underwater Real Estate The continental margin and the deep-ocean basin are subdivided into different areas and have different features, as shown on the next two slides.

8. Chapter 13
Section 2 The Ocean Floor

9. Chapter 13
Section 2 The Ocean Floor

10. Chapter 13
Section 2 The Ocean Floor

11. Exploring the Ocean with Underwater Vessels
Chapter 13
Section 2 The Ocean Floor
Exploring the Ocean with Underwater Vessels
Piloted Vessels: Alvin and Deep Flight Alvin and Deep Flight are two research vessels that can reach some of the deepest parts of the ocean.
Robotic Vessels: JASON II and Medea JASON II and Medea are a robotic team. JASON II explores the ocean floor. Medea is attached to JASON II with a tether and explores above the the sea floor.

12. Chapter 13 Section 2 The Ocean Floor
The Alvin underwater. Image courtesy of Woods Hole Oceanographic Institutions (WHOI)
The Deep East Expedition Leg Two Science Team aboard R/V Atlantis standing in front of Alvin. Image courtesy of Deep East 2001, NOAA/OER.

13. Chapter 13
Section 2 The Ocean Floor

14. Chapter 13 Section 2 The Ocean Floor
Photograph of ROV Jason II. Credit: © Woods Hole Oceanographic Institution.