The Ocean Floor
An underwater mountain range where sea-floor spreading occurs is called...
The high point of a wave is called...
Crest
Which is NOT a way that ocean water moves?
a) waves b) rifting
c) currents d) tides
Rifting
The largest of Earth's five main oceans is...
Pacific
The measure for how salty water is is called what?
Salinity
Trench
The low point of a wave is called...
Trough
A river of water that flows through the ocean is called what?
Current
About how much of earth is covered by water?
75 percent
What are the tiny marine plants and animals that drift in the ocean?
Plankton
Abyssal Plain
The distance from the crest of one wave to the crest of another is called...
Wavelength
Regular, alternating rise and fall of the oceans surface level
Tide
The water cycle is the ongoing movement of water between Earth's land, air, and bodies of water. What is the source of energy for the water cycle?
The sun
Desalination is a process for what?
Removing the salt from salt water
An underwater volcano that rises above sea level is called...
Island
Most ocean waves are caused by...
Wind blowing across the water surface
Prevailing winds and the movement of Earth cause...
Surface Currents
How do ocean currents affect Earth's climate?
By carrying heat from the equator to the poles, and vice versa.
Hydrometer is used to measure what part of a liquid?
Density
The shallow underwater edge of the Earth's land masses is called...
Continental Shelf
The amount of matter in a given volume of a substance is called what?
Density
Tides are caused mainly by...
The Moon's gravitational pull on Earth
Water pressure is simply the weight of water pressing down on something. What happens to the water pressure the further down you go?
Water pressure increases with depth
Nekton and Plankton would probably be studied by whom?
a) marine biologist b) hydrologist
c) cartographer d) meteorologist
Marine Biologist