Show:
OCEANS OF THE WORLD
PROPERTIES OF SEAWATER
STRUCTURE OF THE OCEANS
THE OCEAN FLOOR I
THE OCEAN FLOOR II
100
The scientific study of the oceans
What is oceanography?
100
A measure of the dissolved salts in seawater
What is salinity?
100
Water absorbs light, so below 100 meters, oceans are this
What is dark?
100
A flat or gently sloping submerged part of a continental margin
What is a continental shelf?
100
A line of underwater mountain ranges with a total length of 65,000 km
What are the mid-ocean ridges?
200
The largest ocean in the world
What is the Pacific Ocean?
200
The most abundant salt in seawater
What is sodium chloride (NaCl)?
200
How water temperature changes with depth
What is decreases?
200
The sloping region at the end of a continental shelf
What is a continental slope?
200
Small rolling hills on the ocean floor
What are abyssal hills?
300
The smallest ocean in the world
What is the Arctic Ocean?
300
The highest seawater salinities occur where rates of precipitation are exceeded by rates of this
What is evaporation?
300
Wind and waves mix heat evenly throughout this ocean surface region
What is the mixed layer?
300
The long, narrow steep-sided troughs on the ocean floor at subduction zones
What are deep sea trenches?
300
An underwater canyon that cuts through the continental shelf and slope
What is a submarine canyon?
400
A technique of using reflected sound signals to measure water depth
What is echo sounding or sonar?
400
Of seawater and freshwater, the density of this is greater
What is seawater?
400
The region of ocean just below the mixed layer where temperature decreases rapidly
What is the thermocline?
400
The smooth, flat part of the seafloor
What is the abyssal plain?
400
A hole in the seafloor through which heated fluid erupts
What is a deep-sea vent?
500
Within 5%, the percentage of earth covered by oceans
What is 70%?
500
Of seawater and fresh water, the freezing point of this is higher
What is fresh water?
500
Dense water mass found beneath almost all other ocean water
What is polar water?
500
An underwater volcano that does not rise above the ocean surface
What is a seamount?
500
A sloping accumulation of sediments at the base of a continental slope
What is a continental rise?