What are the most abundant elements in ocean water?
Where is the world's longest mountain chain located?
How many ecological zones make up the benthic environment?
The deep ocean basin consists of the abyssal plain, mid-ocean ridges, ocean trenches, rift valleys and
Which of the following statements is true about the Pacific Ocean?
The ocean's surface temperatures vary with time of year and
The movement of water from the ocean to the atmosphere to the land and back to the ocean is called
With sonar, what happens to sound pulses from a ship after they hit the ocean floor?
The longer it takes sound to return to a ship,
To study the ocean floor, scientists use sonar, piloted vessels, robotic vessels and
Which of the following statements describes nekton?
Marine organisms are grouped by
Why are drift nets a problem?
Nonpoint-source pollution is
Why are oil tankers being built with two hulls?
The physical change of liquid water to water vapor is called
If sunlight warms up only the top 100 m of ocean water, why does the surface zone extend to about 300 m below the surface?
Which of the following is a form of point-source pollution?
What technologies do scientists use to study the ocean floor?
The two major regions of the ocean floor are the continental margin and the
Crabs, seaweed and clams are all
Which zone of the benthic environment is located between low and high tide limits?
Which of the following animals lives mainly in the oceanic zone?
The two major zones in the pelagic environment are
Fishing and farming are ways of harvesting the ocean's
One kind of renewable resource from the ocean is
Wave energy in the North Sea is strong enough to produce power for
Why is plastic trash dangerous to marine animals?
Oil that has drained into waterways and pollutes the oceans is an example of
Which of the following is the world's largest ocean?
Which of the following statements about salt in the oceans is true?
What would happen if the oceans did not absorb energy from the sun?
What do scientists use sonar technology for?
What is special about marine life in the intertidal zone?
How are the ocean's living resources harvested?
Two examples of surface currents are the Gulf Stream and the
Surface currents are caused by
The curved path of global winds and surface currents are caused by
What does a surface current do when it deflects?
As water gets denser, how does it move?
Which currents carry warm water away from the Equator?
The two main parts of a wave are the
When deep water waves reach water shallower than one half their wavelength, they
Where does an undertow take sand and other particles from the shore?
What transports most of the sediment in beach environments?
In the open ocean, whitecaps often form
A local rise in sea level near shore caused by hurricane winds is a
In 1947 Thor Heyerdahl sailed a simple raft from Peru to Polynesia, following the ocean currents for more than 6,000 kilometers. Which statement accurately describes what Heyerdahl proved by this voyage?
Surface ocean currents such as the Gulf Stream
In which direction do global winds blow ocean currents near the Equator?
Which surface current is deflected by the continent of South America?
When air above water gets cold, what happens to water molecules?
Which of the following causes water from deep currents to rise to the surface to replace warm currents?
It is important for scientists to learn as much as possible about El Nino because the weather pattern
How do you calculate wave speed?
Why do waves increase in height as they approach the shore?
In what direction does an undertow flow?
An earthquake causes a tsunami because force from the quake
Which statement describes what is happening at high tide?
Spring tides and neap tides occur in patterns governed by
From what is known about spring tides and neap tides, you can conclude that
If the wavelength of a wave stays the same, what happens when the wave period increases?
Which phrase describes a surface current?
How does the Coriolis Effect make ocean currents appear to move?
How are deep currents different from surface currents?
What is the distance between two crests or troughs?
The Gulf Stream moves warm water from
Which continent deflects the Gulf Stream current?
If ocean currents have changed their circulation patterns, you can conclude that
How would California be different if there were no California Current?
What happens if El Nino damages a coral reef?
Buoyes that record El Nino can transmit data to satellites in space. What can you conclude from this fact?
How often do tides rise and fall?
Which of these is the longest period of time?
Which of these takes exactly 24 h?