Ocean Geography
The deepest known point in the sea
What is Challenger Deep
The level deep ocean floor
What is the abyssal plain
A giant wave, usually caused by an undersea earthquake
What is tsunami
A large stream of ocean water that flows at or below the surface
What is ocean current
The ocean covers more what percentage of the planet's surface
What is 70%
Circular coral-reef island
What is atoll
An underwater mountain
What is a seamount
Gentle, rolling wave that may appear even during calm weather
What is ocean swell
An ocean current that flows beneath the surface of the ocean
What is subsurface current
The study of the earth's oceans
The deep depressions that contain the oceans
What is ocean basins
The huge valley that cuts through the abyssal plain
What is trench
Wave with a white crest due to shallow water
A strong current formed as a wave retreats through a gap in a sandbar
What is a rip current
Two main factors that affect seawater density
What is salinity and temperature
The gently sloped region that stretches away from the continental slope
Huge valley where the crust appears to be separating
What is the rift
The length of time between one crest and the next
What is period
A current that flows in the direction opposite the main current
What is countercurrent
The boundary where cold, deep water meets sun-warmed surface water
What is thermocline
The underwater mountain chain that stretches down the middle of the Atlantic Ocean
Mid-Atlantic Ridge
The level deep ocean floor
What is the abyssal plain
A wave with white foamy top due to strong winds
What is whitecap
A gentle current from receding waves
What is undertow
A huge chunk of floating glacial ice is
What is an iceberg