Pressure
This is the unit used to measure pressure
Bars
The ability or tendency to float in water, air or some other fluid.
Buoyancy
Does light travel faster in the air or the water?
The air
Does sound travel faster in the air or water?
The water
The deepest known part of the ocean.
Mariana's Trench (Challenger Deep)
14.7 pounds per square inch (psi) is the equivalent of this
1 Bar
List a least 2 factors that determine how buoyant an object will be in the ocean.
1. volume of water pushing against the object
2. total surface area of the object making contact with the water
3. the density of the object.
The ability for an organism to produce their own light.
Bioluminescence
These two conditions affect sound in the ocean
temperature and pressure
This person pioneered the use of sound waves in oceanography.
Walter Munk
Pressure increases by 1 bar every ______________ feet.
33
Describe the relationship between buoyancy and pressure
Pressure increases the buoyant force.
Why are there no plants in the deeper parts of the ocean?
Lack of sunlight
A series of clicks and whistles used by some organisms to gain a mental picture of what is around them.
Echolocation
The number of decompression stops that a diver must make is determined by these two factors.
1. The length of time they stay underwater
2. The depth at which they dive
Describe the relationship between pressure and depth.
Pressure increases as depth increases.
List at least 2 reasons why organisms use bioluminescence.
1. defense
2.finding or luring prey
3. communication and signaling
This system is used to detect objects under the water and measuring the depth of the sea floor by emitting sound pulses and measuring the rate of their return
SONAR
List at least 2 things that can happen to a diver if they fail to decompress properly.
2. The Bends-severe pain in the joints
3. Impaired nervous system leading to seizures and loss of consciousness.
Describe what would happen to any air filled cavities when subjected to high pressure
They would condense and collapse.
Why is the ocean blue?
It reflects the sky.
The water absorbs all wavelengths except green, blue, and violet
also, algae blooms, or weather affect the color
Describe the SOFAR channel
channel in the deep ocean where sound travels very long distances.
List at least two adaptations that a fish that live in the deepest part of the ocean may have
No swim bladder or cavity is filled with oil
bioluminescence