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OCNG 251 Exam 1 Questions and Answers 100% Solved
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OCNG 251 Exam 1 Questions and Answers 100% Solved Oceans cover... - 70.8% of Earth's surface 4 Principal Oceans (plus 1) - - Pacific Ocean - Atlantic Ocean - Indian Ocean - Arctic Ocean - (the plus 1) Southern Ocean Or "Antarctic Ocean" Pacific Ocean - - Largest ocean, covers over a third ...

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  • October 22, 2024
  • 19
  • 2024/2025
  • Exam (elaborations)
  • Questions & answers

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  • OCNG 251
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©JOSHCLAY 2024/2025. YEAR PUBLISHED 2024.

OCNG 251 Exam 1 Questions and

Answers 100% Solved


Oceans cover... - ✔✔70.8% of Earth's surface

4 Principal Oceans (plus 1) - ✔✔- Pacific Ocean

- Atlantic Ocean

- Indian Ocean

- Arctic Ocean

- (the plus 1) Southern Ocean

Or "Antarctic Ocean"

Pacific Ocean - ✔✔- Largest ocean, covers over a third of Earth's surface

- Deepest Ocean - average depth: 3940 meters

- Contains the deepest point in all oceans - 11,022 meters (6.85 miles) in

the Mariana Trench

Atlantic Ocean - ✔✔- Second largest ocean

- Half the size of the Pacific Ocean

- Average depth: 3844 meters

,©JOSHCLAY 2024/2025. YEAR PUBLISHED 2024.

Indian Ocean - ✔✔- Mainly located in the Southern Hemisphere (i.e. south

of the Equator or 0o latitude)

- Slightly smaller than Atlantic Ocean but around same average depth

(3840 meters)

Arctic Ocean - ✔✔- Small - 7% size of Pacific

- Shallow - about a quarter as deep as the other oceans (average depth

1,117 meters)

- Permanent layer of sea ice at surface (few meters thick)

(+1) Southern Ocean - ✔✔- Defined by meeting of currents near Antarctica

called the Antarctic Convergence

- Actually parts of Pacific, Atlantic, and Indian Oceans south of 50o South

Latitude

Seas - ✔✔- Smaller and shallower than oceans

- Salt water

- Directly connected to world ocean

- Usually enclosed by land

-- Sargasso Sea defined by surrounding ocean currents

, ©JOSHCLAY 2024/2025. YEAR PUBLISHED 2024.

The Modern Seven Seas - ✔✔North and South Pacific, North and South

Atlantic, Indian, Arctic, Antarctic

Pacific Navigators - ✔✔- The peopling of the Pacific Islands required

extensive travel in open boats and exceptional navigation skills.

- It was difficult because islands are widely scattered.

Early History of Ocean Exploration - ✔✔boat technology developed 40,000

years ago, likely for food and trade

European Navigators - ✔✔Phoenecians, Greek Pytheas, Eratosthenes

Phoenecians - ✔✔- first from Western Hemisphere to develop navigation

arts

- Navigated circa 2000 B.C.

- Explored Mediterranean Sea, Red Sea, and Indian Ocean

- First circumnavigation of Africa

- Reached the British Isles

Greek Pytheas - ✔✔- Sailed northward using a simple method to determine

latitude in 325 B.C.

- Navigated using the North Star

Eratosthenes - ✔✔determined Earth's circumference fairly accurately.

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