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Hns Oc Unit 2 Geology Flashcards | StudBud
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Hns Oc Unit 2 Geology
Hns Oc Unit 2 Geology
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1
Seamounts are formed from underwater volcanoes.
False
True
2
The source of the water that originally formed the oceans came from the melting of the polar ice caps.
False
True
3
Mid-ocean ridges form:
in deep ocean trenches
where two oceanic plates are moving apart and creating new seafloor
at subduction zones
anywhere in the middle of the ocean
4
An example of a subduction zone is:
the Mid-Atlantic ridge
The San Andreas fault
The Mariana Trench
The East Pacific rise
5
The deepest point in the ocean is in the Mariana Trench.
False
True
6
The Earth's oceans formed approximately ___________ years ago.
6 billion
4 million
4 billion
2 million
7
Name the structure at letter C.
seamount
submarine canyon
trench
guyot
8
An area where old oceanic crust is being destroyed/recycled is called:
mid-ocean ridge
abyssal plain
seamount
subduction zone
9
Which of the following is not a part of the continental margin?
shelf
rise
slope
plain
10
Sediments that are made from the remains of once living organisms are called:
lithogenous
biogenous
biosediments
hydrogenous
11
What letter represents where seafloor is being destroyed/recycled?
H
G
A
D
12
What letter represents where seafloor is being created?
D
A
H
G
13
4 of the principle oceans of the Earth are:
Arctic, Pacific, Indian, Antarctic
Southern, Mediterranean, Indian, Arctic
Atlantic, Arctic, Antarctic, Indian
Atlantic, Pacific, Indian, Arctic
14
Continental crust is thicker and more dense than oceanic crust.
True
False
15
Seamounts/underwater volcanoes tend to be concentrated near mid-ocean ridges and subduction zones.
True
False
16
The Earth's innermost layer is the mantle.
False
True
17
The Ring of Fire is an area of high tectonic activity in the Pacific Ocean.
True
False
18
The oceans cover less than half of Earth's surface.
False
True
19
The thickest of Earth's layers is the:
inner core
mantle
crust
outer core
20
What letter represents the abyssal plain?
K
J
I
F
21
Name the structure at letter A.
trench
seamount
submarine canyon
guyot
22
Evidence for continental drift and plate tectonics includes:
geological features in the Americas and in Asia that line up
the age of the seafloor increases as you go away from the mid-ocean ridge
magnetic records in stripes perpendicular to major mountain ranges
fossils found in South America match those found in Africa
