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Lecture Starts: 22:55
The Oceans of Our Planet, Part 1
Lesson 01: MNotes01-1a
1. How many large ocean basins are there in
the world? ______________
2. The 4 large ocean basins of the world are the ______________ Ocean, the ______________ Ocean, the ______________ Ocean, and the ______________ Ocean.
3. The part of the earth's crust that is covered with ocean is made up of ______________ crust.
4. The oceanic crust is composed mainly of ______________, which is relatively dense solidified lava.
5. The ______________ crust is the part of the earth's crust that is not covered with ocean.
6. The continental crust is composed mainly of ______________, which is less dense than the crust under the ocean.
7. The crusts float on the earth's ______________.
8. The slow-flowing material that makes up the mantle is called ______________ rock because it sometimes behaves like liquid and sometimes behaves like solid.
9. Scientists hypothesize that all the continents of the world were once part of a large super-continent called ______________.
10. The plates of the earth's crust are believed to have drifted to their present locations via a process known as plate ______________. The movement of the continents to their present locations is also known as continental ______________.
11. The two types of geological structures where two plates meet are (1) a ______-______________ ridge system and (2) a ______________ system.
12. In a mid-ocean ridge system, two plates move away from each other via the process called _______________ _______________.
13. In a trench system, two plates move towards each other, one dipping down into the mantle. This process is called ______________.
14. The geologic activity most commonly found around ______________ systems is in the form of earthquakes.
15. The geologic activity most often found around trench systems is in the form of ______________.
16. Oceanic crust formation mostly occurs in the ______________ Ocean where there is a large mid-ocean ridge. Oceanic crust is destroyed mostly in the ______________ Ocean where there are more numerous deep ocean trenches.
17. The gently sloped shallow section of the edge of a continent is called the ______________ shelf. This location is where most ocean life is found.
18. The shelf break is located at the point where the slope of the bottom begins to become ______________.
19. True or False: The continental slope is found in Sun Valley, Idaho and is a favorite winter skiing slope. ______________
20. The ______________ plain is the deepest region of the seafloor.
21. The major property of water that keeps its molecules together is ______________ bonding. This creates a flexible skin at the water's surface called ______________ tension.
22. Water naturally exists on earth in three phases:
(a) ______________ in the form of ice or snow
(b) ______________ in the form of water
(c) ______________ in the form of water vapor.
23. When water freezes it becomes _________ __________, allowing solid water to float on liquid water.
24. Water has a high ______________ heat; therefore, it does not change temperature very quickly despite drastic air temperature changes.
25. True or False: Water is often called the universal solvent because it can dissolve more substances than most other liquids. ______________
26. Seawater consists of pure water with materials dissolved in it. The solids in seawater come from the ______________ of rocks and ______________ vents.
27. ___________________ is a measure of the total amount of salt dissolved in a solvent.
28. ______________ will result in greater salinity of the water left behind.