Navigation » List of Schools » Glendale Community College » Oceanography » Ocean 115 – Introduction to Oceanography » Spring 2022 » Reviving Dead Zone Quiz Black Sea
Below are the questions for the exam with the choices of answers:
Question #2
A Mussels filter water but bacterial decomposition consumes as large amount of oxygen. The end result is the mussels collapse from low oxygen.
B Mussels use so little oxygen that once the nutrients fall other animals out compete them and cause the mussels to collapse.
C Mussels release too many nutrients.
D Mussels eliminate all other animals that can live there.
Question #3
A All of these
B Governments have to reduce the intensity of commercial fishing activities.
C Landmark iniatives to maintain runoff nutrients also need to be put into effect.
D Comprehensive plans must be in place in order to prevent nitrogen and phosphorus from getting into the water.
E Governments must make sure economic development does not lead to resurgence of nutrients into the sea.
Question #4
A Dearth of nearby healthy populations of marine plants & animals that can provide the seed stock
B River catchments that store high amounts of nutrients dissolved ingroundwater or trapped in soils
C All of these
D Eutrophication
Question #5
A Dead zones can be restored by adding nutrients from the land to the water.
B Nothing can be done to restore the area
C Dead zones can be restored by reducing the nutrient delivery from nearby lands
Question #6
A 7 days
B 3 days
C Its entire life
D 40 days
E 20 days
Question #7
A An imbalance of the food chain worsened by immense fishing. The hunting of a top predator results in rising numbers of zooplankton and less phytoplankton.
B An imbalance of the food chain worsened by immense fishing. The hunting of a top predator results in rising numbers of smaller fish eating more zooplankton and leading to more phytoplankton.
C It occurs when plankton die and thus all who need them die
D It occurs when fishing vessels catch all members of one species and then catch all members of another.
Question #8
A This is a problem because diatoms become outnumbered by small or less digestible types of species and gelatinous organism reduce the efficiency of the food chain causing fish stocks to drop.
B Diatoms are toxic and they destroy all food webs
C Gelatinous organisms eat all the diatoms
D Its causing the diatoms to outnumbered other ocean creatures
Question #9
A No
B Yes
C Not yet but models predict it will be in 50-100 years
Question #10
A Rising fossil fuel use, mass breeding of food animals and intensive farming, and the construction of sewage systems drive excess nitrogen into coastal waters.
B Overfishing, bykill, and thermo luminescience.
C Rising fossil fuel use, bykill, and the construction of sewage systems drive excess nitrogen into coastal waters.
D Rising fossil fuel use, mass breeding of food animals and intensive farming, and bykill.
E Nuclear energy use, mass breeding of food animals and intensive farming, and the construction of sewage systems drive excess nitrogen into coastal waters.
Question #11
A The over enrichment of the sea by nutrients that allow plants to grow.
B A rapid rise in the pH of water.
C A drop in the salinity of the ocean.
D The spill of chemicals that block plant growth.
Question #12
A 100,000 square kilometers
B 1,000 square kilometers
C 10,000 square kilometers
D 40,000 square kilometers
E 20,000 square kilometers
Question #13
A An area of hypoxia or where there is too little oxygen in the water causing organisms to die
B An area where all the fish have been caught
C A burial ground for dead animals no longer useful on a farm