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Q 1/46
Score 0
What type of questions have scientists had about oceans in the past that we know can answer?
30
All of these
What does the ocean floor look like?
How much of the Earth is covered by the ocean?
How deep is the ocean?
Q 2/46
Score 0
95% of Earth's surface is water.
30
True
False
46 questions
Q.
What type of questions have scientists had about oceans in the past that we know can answer?
1
30 sec
Q.
95% of Earth's surface is water.
2
30 sec
Q.
Which of these would not be considered a category of study within oceanography?
3
30 sec
Q.
Which of the following is not a main ocean basin?
4
30 sec
Q.
Which ocean is the largest and deepest?
5
30 sec
Q.
Which ocean is geographically considered the southernmost?
6
30 sec
Q.
Which ocean is geographically considered the northernmost?
7
30 sec
Q.
If all the world's oceans were drained, which of the following would probably not be observed?
8
30 sec
Q.
Define topography.
9
30 sec
Q.
Where is the Mid-Atlantic Ridge and St. Paul Fracture Zone be located - the source of new land being produced via divergent boundaries?
10
30 sec
Q.
What techniques describe the study of collecting data about the world's oceans and their shape and topography?
11
30 sec
Q.
Sonar is also referred to as 'echo sounding' because it uses sound waves to study the ocean floor.
12
30 sec
Q.
Why is the use of multi-beam sonar known as "mowing the lawn"?
13
30 sec
Q.
Satellites have yet to be implemented, in conjunction with the use of sonar, to be used in collecting data about the topography of oceans; however, scientists hope to use this approach in the future.
14
30 sec
Q.
Unlike sonar, which uses radio waves, satellites use microwaves to reflect off the surface of ocean floors to study the topography of the ocean floor.
15
30 sec
Q.
Submersibles like the Alvin, Sea Cliff II, and AUV are unmanned vessels capable of being remotely controlled and descending deep into the ocean to collect data.
16
30 sec
Q.
Which of the following is not considered a major region of the oceans?
17
30 sec
Q.
How do the continental margins of the atlantic and pacific oceans differ?
18
30 sec
Q.
Why does the pacific ocean contain narrower continental margins compared to the atlantic ocean?
19
30 sec
Q.
What topographical feature would you experience first if you traveled from a continent toward mid-ocean?
20
30 sec
Q.
Why is the continental shelf important economically and politically?
21
30 sec
Q.
What topographical region marks the boundary between the continental and oceanic crusts?
22
30 sec
Q.
What are the regions cut into the continental slopes which are deep and steep-sided valleys?
23
30 sec
Q.
How have the submarine canyons been formed?
24
30 sec
Q.
Turbidity currents are an important mechanism whereby sediment is transported and submarine canyons are formed.
25
30 sec
Q.
Continental rises have a much steeper slope than continental slopes or continental shelves.
26
30 sec
Q.
The ocean basin floor is about the same size as the land above sea level.
27
30 sec
Q.
Deep-ocean trenches form the deepest parts of the oceans and are sites of plates convergence where tectonic plates subduct.
28
30 sec
Q.
Deep-ocean trenches are not areas of high earthquake and volcanic activity.
29
30 sec
Q.
Abyssal plains are flat features of the ocean floor that have been formed by turbidity current carrying sediments that have settled.
30
30 sec
Q.
What are volcanoes in the oceans that have not reached the ocean surfaces?
31
30 sec
Q.
Islands formed by oceanic volcano activity continue rising over time to form continents due to the building action of erosion and running water.
32
30 sec
Q.
What is the longest interconnected topographical feature of earth composed of a system of underwater mountains developing from divergent boundaries?
33
30 sec
Q.
Mid-ocean ridges are very narrow.
34
30 sec
Q.
What important geologic activity takes place at the mid-ocean ridges?
35
30 sec
Q.
What important ocean feature is created by mid-ocean ridges that release important minerals and metals?
36
30 sec
Q.
Most of the seafloor is covered in sediment.
37
30 sec
Q.
Which type of sediments are located on the on the continental shelf and deep-ocean seafloor?
38
30 sec
Q.
Which type of seafloor sediment originates on land and consists of grains that are transported from continental rocks to the ocean?
39
30 sec
Q.
Which type of seafloor sediment is composed of skeletons of once-living organisms
40
30 sec
Q.
What is the difference between calcareous and siliceous ooze?
41
30 sec
Q.
What type of seafloor sediment occurs when minerals crystallize from ocean waters via chemical reactions?
42
30 sec
Q.
What are the two main energy sources we obtain from the seafloor?
43
30 sec
Q.
What process in the oceans occur that leaves halite for the use of humans?
44
30 sec
Q.
How is oil formed and natural gas formed?
45
30 sec
Q.
Which of the following is NOT a resource that humans can derive from the ocean floor?
