Dissolved Oxygen
High amount of Dissolved Oxygen in a lake indicate?
Better water quality
How can you compare the density of water and ice?
Why estuaries are formed?
When sea levels rise and fill in an existing river valley.
Which zone is associated with the thermocline and pycnocline?
Pycnocline Zone
What is special about the SOFAR channel?
Allows sound to carry great distances.
What reduces dissolved oxygen in water?
Temperature increases, decaying aquatic plants and algae, fertilizers, and weather changes
What if ice was more dense than water?
The ice would sink and collect at the bottom.
An estuary is best defined as a place where
Fresh and Salt water meet
What two factors affect the pycnocline the most?
Seawater temperature and Salinity.
What causes the SOFAR layer and shadow zones in the ocean?
Specific combinations of temperature, pressure, and salinity
What is the highest level of dissolved oxygen in water?
more than 20 mg/L
What would happen if ice didn't float on water?
it would form at the bottom of a body of cold water rather than the top
What is an Estuary?
What causes a halocline?
Less dense fresh water from the land forms a layer over salt water from the ocean.
What is a shadow zone in the ocean?
Does oxygen increase pH in water?
What does ice float on water?
Ice floats because it is less dense than water.
Which of the following is NOT TRUE of estuaries?
A. Estuaries provide a habitat for biotic factors
B.Estuaries create a protective refuge for living things
C.Estuaries allow juvenile animals to grow into adults safely
D.Estuaries create shelter for aquatic and non-aquatic life.
Estuaries create shelter for aquatic and non-aquatic life.
What affects thermocline depth?
What is special about the Shadow zone?
Submarines hide from sonar in the shadow zone.
Can dissolved oxygen be greater than 100?
Dissolved oxygen readings of greater than 100% air saturation can occur in environmental water
At what temperature does water reach its maximum density?
Where is the largest estuary in the 48 contiguous United States?
Chesapeake Bay
What phase of water is least dense?
How deep is the shadow zone?
Around 2 kilometres (1.2 miles) below the surface of the Indian and Pacific Oceans