1. The Ocean Floor Notes
December 2, 2018

2. The Earth’s Oceans 71% of the Earth is covered by ocean
Four main oceans:
Pacific (largest)
Atlantic
Indian
Arctic (smallest)
The southern hemisphere is dominated by water

4. Pg 396: List the major features of the ocean floor

5. Continental Margins Continental Shelf Continental Slope
Gentle slope from the coastline
Continental Slope
Marks boundary between continental crust and oceanic crust
Submarine Canyons
Continental Rise

7. Ocean Basin Floor Deep Ocean Trenches Abyssal Plains Seamounts
Form at the edge of two plates that are moving together
Deepest places on Earth (Mariana Trench – 36,000 ft deep
Abyssal Plains
Extremely flat regions of the ocean
Seamounts
Underwater volcanoes

9. Mid-Ocean Ridges
Found near the center of some oceans where the Earths plates are separating
Magma comes to the surface to form new crust
Hydrothermal Vents
Super-heated water (up to 800F) rich in minerals vents from the crust.
Extreme forms of life live near these vents

12. Questions
Pg 400: 1, 3
Pg 405: 2-5
Pg 417: 11, 14, 32, 33