OCNG 251 Exam 1 UPDATED Questions and CORRECT Answers
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Course
OCNG 251
Institution
OCNG 251
OCNG 251 Exam 1 UPDATED Questions
and CORRECT Answers
What are some of the reasons we study the ocean? - CORRECT ANSWER- It's
interesting- scientific curiosity!
70% of Earth covered in Earth
The ocean provides ~50% of the oxygen we breath comes from phytoplankton from the
ocean.
The ocean...
OCNG 251 Exam 1 UPDATED Questions
and CORRECT Answers
What are some of the reasons we study the ocean? - CORRECT ANSWER- ✔✔It's
interesting- scientific curiosity!
70% of Earth covered in Earth
The ocean provides ~50% of the oxygen we breath comes from phytoplankton from the
ocean.
The ocean influences weather and climate all over the planet
Provides valuable resources.
Oceanography is interdisciplinary. - CORRECT ANSWER- ✔✔Brings in different sciences
to be able to understand it as a system. Made up of pieces of geology, biology, chemistry,
astronomy, and geography, and physics.
Metric System - CORRECT ANSWER- ✔✔(SI units)
Easy to use as fractions and multiples are related to one another by factors of 10. Metric units
are the units of science.
Describe the scientific method. Why is it such an important concept? - CORRECT
ANSWER- ✔✔To discover underlying patterns in a natural world and use this knowledge to
make predictions about what will happen under a given set of conditions.
What is the grid system we use to find where we are on Earth? - CORRECT ANSWER-
✔✔latitude and longitude
How many oceans are there? - CORRECT ANSWER- ✔✔5 Oceans: Pacific Ocean, Atlantic
Ocean, Indian Ocean, Southern Ocean, and the Arctic Ocean.
Which ocean is the biggest/shallowest? - CORRECT ANSWER- ✔✔Biggest- Pacific
Smallest- Artic
What is the mean depth of the ocean? - CORRECT ANSWER- ✔✔~3.8 km (2.36 mi)
, Explorations of the Oceans- Polynesian Navigators - CORRECT ANSWER- ✔✔used
movements of stars, seasonal winds, to navigate. Followed flights of birds. Noticed changes
in water when close to island.
Describe the layers of the Earth in terms that relate more to chemistry (composition). -
CORRECT ANSWER- ✔✔Crust
- thin (4-60 km)
- low density minerals (silicates, Fe & Si)
Mantle
- thicker (2800 km)
- higher density minerals (Fe & Mg)
Core
- thickest (3500 km to center)
- highest density minerals (Fe and Ni)
Describe the layers of the Earth in terms that relate more to physical differences (properties).
- CORRECT ANSWER- ✔✔Lithosphere
i. cool, rigid, brittle
ii. crust + upper most mantle
Asthenosphere
i. warm, plastic (will flow)
ii. upper mantle
Mesosphere
i. rigid (due to high pressure)
ii. middle + lower mantle
Outer core
i. liquid
Inner Core
i. rigid (due to high pressure)
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