C h. 18-19: Oceans
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Transcript of C h. 18-19: Oceans
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Ch. 18-19: Oceans
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Which type of ocean pollution is caused by agriculture, deforestation & construction?
• a. solid-waste pollution
• b. sewage pollution
• c. sediment pollution
#1
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At a mid-ocean ridge, what is the next step after the ocean
plates separate?
• a. Hot magma seeps through the
cracks
• b. water cools the lava
• c. a trench forms
#2
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Oil, natural gas, sand, metals, and diamonds are
mined from deposits found in ___________.
• a. Continental shelves
• b. Deep water deposits
• c. Ocean trenches
#3
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Algal blooms are caused by ____________.
• a. sewage
• b. Oil spills
• c. silt
#4
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The mid-ocean ridge is an underwater mountain range that forms from ________.
• a. a transform boundary
• b. subduction zone
• c. seafloor spreading
#5
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A _________ forms when one oceanic crust plate
sinks beneath another at a subduction zone.
• a. seamount
• b. mid-ocean ridge
• c. rift valleys
#6
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Sediment settles constantly on the ocean floor and these
deposits fill in valleys and create flat seafloor areas called
___________.• a. continental
slopes
• b. submarine canyons
• C. abyssal plains
#7
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The largest source of oil pollution in the ocean is ________.
• a. Runoff from land
• b. Offshore drilling
• c. Shipping
#8
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Most ocean pollution comes from ____________.
• a. fish
• b. land
• c. ships
#9
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Which type of ocean pollution acts like a fertilizer and causes algae to outgrow and eventually kill coral?
• a. oil pollution
• b. sewage
• c. chemical pollution
#10
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The place where new ocean floor forms is called a(n)
___________.
• a. abyssal plain
• b. mid-ocean ridge
• c. trench
#11
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Which type of ocean pollution includes the carrying of
herbicides, insecticides & industrial waste by streams into
the oceans?• a. chemical pollution
• b. oil pollution
• c. sewage
#12
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A relatively flat but gradually sloping end of a continent
that extends under the ocean
• a. Abyssal plain
• b. Continental slope
• c. Continental shelf
• d. Seamount
#13
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The deepest place in the Pacific Ocean
• a. Abyssal plain
• b. Mariana Trench
• c. Continental shelf
• d. mid-ocean ridge
#14
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The area in an ocean basin where new ocean floor is
formed
• a. Abyssal plain
• b. ocean trench
• c. seamount
• d. mid-ocean ridge
#15
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Flat seafloor areas
• a. Abyssal plain
• b. ocean trench
• c. seamount
• d. mid-ocean ridge
#16
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A long, narrow, steep-sided depression where one plate
sinks beneath another
• a. Abyssal plain
• b. ocean trench
• c. seamount
• d. mid-ocean ridge
#17
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Underwater, inactive volcano peaks
• a. Abyssal plain
• b. ocean trench
• c. seamount
• d. mid-ocean ridge
#18
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The steep area that extends from the outer edge of the
continental shelf down to the ocean floor
• a. Abyssal plain
• b. continental cliff
• c. continental plain
• d. continental slope
#19
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In the picture, the right angle position of the Earth, Moon, and Sun result in __________.
• a. a spring tide
• b. a neap tide
• c. no tides
• d. high tides everywhere
#20
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Which of the following is NOT a method of desalinating ocean
water?
• a. Filtering through a membrane
• b. Freezing ocean water
• c. Using a solar powered
plant• d. Melting
glaciers
#21
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Tides are affected by the positions of __________.
• a. Earth, Sun, and Mars
• b. Venus, Earth, and Mars
• c. Earth and Moon only
• d. Earth, Moon, and Sun
#22
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In the picture, the positions of the Earth, Moon, and Sun are aligned. This creates _________.
• a. a spring tide
• b. a neap tide
• c. no tides
• d. high tides everywhere
#23
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In which direction does the Coriolis Effect cause currents in the northern
hemisphere to turn?
• a. clockwise
• b.counterclockwise
• c. north
• d. south
#24
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What is the direction of ocean currents in the southern hemisphere?
• a. clockwise
• b.counterclockwise
• c. north
• d. south
#25
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Which of the following is a reasonable conclusion based on the information in the picture?
• a. The Pacific Ocean is deep• b. The oceans’ currents only flow in
one direction
• c. The oceans’ waters are
constantly in motion• d. The North Equatorial current flows east to west
#26
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Deep down in the cold ocean depths, currents circulate
because of __________.
• a. density differences
• b. wind blowing
• c. polar ice caps melting
• d. geography
#27
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Most waves form because of ___________.
• a. the Coriolis Effect
• b. winds blowing across the water’s
surface transfer their energy to the water
• c. the salinity of ocean water
• d. none of the above.
#28
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Which of the following could increase the ocean’s salinity?
• a. Decrease precipitation and
little warmth
• b. More water entering the
oceans
• c. More water evaporating
leaving the salt behind
• d. Polar ice caps melting
#29
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The Gulf Stream starts near the __________ and carries _________
water up the east coast of the United States.
• a. north pole, cold
• b. north pole, warm
• c. equator, warm
• d. equator, cold
#30
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Which statement provides the best description of why a
wave breaks?
• a. The top of the wave moves faster
than the bottom
• b. The wind pushes the top
of the wave over
• c. The bottom of the wave moves faster than the top
• d. The top of the wave has a greater
concentration of salt than the bottom
#31
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________ is measured by the distance between a crest and
a crest or a trough and a trough.
• a. amplitude
• b. frequency
• c. wave height
• d. wavelength
#32
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What causes most surface currents to start moving?
• a. The Gulf Stream
• b. density differences
• c. wind
• d. salinity
#33
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A wave is a rhythmic movement that carries ______
through matter or space.
• a. energy
• b. water particles
• c. heat
• d. salt
#34
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Which of the following terms is used to describe the amount of
dissolved salts in seawater?
• a. density
• b. salinity
• c. buoyancy
• d.temperature
#35
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