Download Ocean Regions Day 2

Ocean Regions
Monday November 15, 2010
Objectives
• I will be able to illustrate and define the
______floor’s ___________ and
______________.
• I will be able to relate the theory of
________________________to the
_________________on the ocean floor.
Key Points
• The three major regions of the ocean floor are the continental
margins, the ocean basin floor and the mid-ocean ridges.
• The gently sloping submerged surface extending from the shoreline
toward the deep ocean is called the continental shelf.
• At the continental margin in the Pacific Ocean there are
earthquakes, volcanoes and plate activity.
• Seamounts are volcanoes that form on the ocean floor.
• Mid-ocean ridges are associated with mountainous topography.
• The abyssal plains are thought to be the most level places on earth.
• The deepest part of the ocean are ocean trenches.
• Seafloor spreading occurs at divergent plates.
Mapping the Ocean Floor
• Scientists______________________________
________________ to map the ocean floor
• The three main regions of the ocean floor are
1. The ______ __ ______ ____ _ ______ _____
2. The ______ ___ ______ ___ __ ______ ____
3. The ______ ______ ______ ______ ______
• THINK: Where have we heard about midocean ridges before?
Ocean Regions
• Where are the
continental margins,
mid-ocean ridge, and
ocean basin floor?
Ocean Regions
• Continental Margins
– The zone of ______ ______ between the continent
and the ocean basin floor
• In the Atlantic the continental margin is ______ ___and has
little volcanic or earthquake activity
• In the Pacific oceanic crust is pushed under continental crust
– What is this called?
• A ______ ______ ______ that causes
______ ______, ______ ______, and other ______
______ ______
Ocean Regions
• Continental Margins are divided into the
continental shelf, continental slope, and
continental rise
1. The ______ ______ ______ is the gently ______
______ ______ ______ that goes from the
shoreline toward the deep ocean
- contains important ______ ______ such as…
(what were the resources we discussed on
Friday?)
Ocean Regions
2. The ______ ______ ______ is a _______
gradient that leads to the deep-ocean floor
- Contains submarine canyons carved out by
turbidity currents
3. The ______ ______ ______ ______ is the
______ ______ ______ surface at the base of
the continental slope.
Identify the different features of the
continental margin
Ocean Regions
• The ______ ______ ______ is the area of the
deep ocean floor ______ ______ ______
______ ______ ______ ______
• There are a lot cool features of the ocean
basin floor
– Deep ocean __ ______ ____
– __ ______ ____ plains
– ______ ______ ______
Ocean Regions
• Deep-ocean trenches form at plate boundaries… which
type of boundary do you think?
– Trenches are ______ ______ ______ part of the ocean.
EXPLORE THE MARIANA TRENCH
• Abyssal Plains are ______ ______ ______ area of the
deep-ocean floor
– They are the ______ ______ ______ ______
• ______ ______ ______ ______ that form on the ocean
floor
Ocean Regions
• Mid-Ocean Ridges are found near the center
of most ocean basins where ______ ______
______ meet
• Mid-ocean ridges are associated with ______
______ ______ ______ ______ ______ _____
Check In Questions
1. What are the three major regions of the ocean
floor?
2. Describe mid-ocean ridges. Where are they, what
type of plate boundary are they associated with,
what features would you see at mid-ocean ridges?
3. How is the continental margin of the Pacific
different from the continental margin of the
Atlantic?
4. What are the deepest parts of the ocean?
5. What are the most level places on Earth?
Ocean Regions
• Draw a diagram of the ocean floor and define the
terms.
• Include all three regions of the ocean and the
features listed here:
Continental margin
Deep-ocean trenches
Continental shelf
Abyssal plain
Submarine canyon
Seamounts
Turbidity currents
Mid-ocean ridges
Continental rise
Seafloor spreading
Ocean basin floor
Hydrothermal vents
Vocabulary (just in case you don’t have
your list from Friday) DUE FRIDAY 11/19
• 1. Oceanography
2. Sonar
3. Submersible
4. Continental margin
5. Continental shelf
6. Continental slope
7. Submarine canyon
8. Turbidity current
9. Continental rise
10. Ocean basin floor
11. Abyssal plains
12. Seamounts
13. Mid-ocean ridges
14. Seafloor spreading
15. Salinity
16. Thermocline
17. Trophic level
18. Photic zone
19. Aphotic zone
20. Mixed zone
21. Deep zone
22. Density
23. Plankton
24. Nekton
25. Benthos
26. Coriolis Effect
27. Abrasion
28. Seawall
29. Beach nourishment
30. Groin