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What type of current can erode the ocean floor to produce submarine canyons?
Salinity current
Countercurrent
Upwelling
Turbidity current
Why can icebergs float in seawater?
They are less dense than seawater
What is the main factor that affects the color of the oceans?
Water temperature
Surface reflection
Natural color
Impurities
What oceanographic tool is a highly maneuverable robot linked to a support ship by cables?
DSV
AUV
ROV
FLIP
What substance makes up most of the salt in the oceans?
Sodium chloride
What is a circular coral-reef island that grows around an underwater volcano?
Guyot
Sandbar
Atoll
Rift
What is any area of the sea that exceeds 6000 m in depth?
Abyssal plain
Seamount
Hadal zone
Submarine canyon
What are large waves created by underwater disturbances such as earthquakes?
Tsunamis
What is a huge, muddy valley that cuts deep into the ocean floor?
Trench
Ocean basin
Shelf break
Submarine canyon
What oceanographic tool charts currents far beneath the surface and sends back accurate measurements of them?
Drift bottle
Niskin bottle
Profiling float
Oceanographic buoy
What type of underwater valley gives mid-ocean ridges the appearance of having twin mountain ranges?
Guyot
Trench
Submarine canyon
Rift
What kind of current occurs when a land breeze pushes surface water away from the coast?
Upwelling
Rip current
Countercurrent
Undertow
What is a wave that grows taller as it travels to shore and topples forward with a white crest?
Upwelling
Breaker
Surf
Rip current
What device do oceanographers use to measure the temperature at different levels and report them back?
Expendable bathythermograph
Niskin bottle
CTD sensor
Rosette
What device has an open tube that is dropped to the sea floor to allow its weight to puncture sediment?
Pressure corer
Gravity corer
Column corer
Piston corer
What are the dangerous currents called that form when large amounts of water from waves surge out to sea through a break in a sandbar?
Rip current
