1.)Low tide is the best feeding time for land predators such as sea gulls.
True
False
2.)Plants are not part of food chains.
True
False
3.)
Both currents and tides are predictable patterns of movement in water.
True
False
4.)
The main benefit of an upwelling is that it
creates strong tides in coastal regions
increases the salinity of the water in an area
brings new nutrients into an underwater region
wipes out entire ecosystems, allowing for secondary succession
5.)Which of the following is true of brackish water?
The salinity of the water can vary with the tides.
There is usually more fresh water than salt water.
Very few organisms can survive in brackish waters.
It is most common in the deepest region of the ocean.
6.)A high tide will occur
usually only once in a 24-hour period
only in bodies of water close to the moon
on both sides of the earth at the same time
when proximity to the sun makes the days longer
7. Brackish water is most commonly found in
seas
rivers
oceans
estuaries
8.)All of the following are characteristics of the blue crab EXCEPT
it has no natural predators
blue crabs often feed on each other
it can adapt to varying levels of salinity
it migrates to cooler temperatures as it ages
9.)Unusual weather can change the tides.
True
False
10.)Black sand can be found when
tides are particularly high
sediment contains volcanic ash
local residents prefer it to light sand
all the sand is washed away from the beach
11.)Which of the following is a benefit of inhabiting an estuary?
The water levels are consistent.
The salinity levels are usually stable.
There are fewer strong ocean currents.
Very few predators can survive in brackish water.
12.)All of the following can influence tides EXCEPT
winds
hurricanes
heavy rains
the shoreline
13.)All of the following influence tides EXCEPT
the sun
the moon
the air temperature
the rotation of the earth
14.)The organisms that can tolerate the most time out of water would live in the
spray zone
high-tide zone
middle-tide zone
low-tide zone
15.)When the pull of the moon is strongest, tides will be lowest.
True
False
