Aquatic Science Exam Review: Test Your Knowledge

1. Unit #3 Exam Review Quiz #1 Grade: «grade» Aquatic Science Subject: «date» Date:

2. 1 Which of the following describes alkalinity: A A system’s ability to deal with the addition of a catalyst B A system’s ability to deal with the addition of hydroxide C The sum of all hydronium and hydroxide during the dissociation of water molecules D The sum of equivalents of all species that can neutralize an acid

3. 2 All of the following are true about chlorine & chlorime byproducts EXCEPT A it can destroy bacteria, viruses, and difficult to kill parasites such as Giardia B there is evidence that the byproducts of chlorine can cause birth defects C it can cause large/accelerated gestational age/growth D it can cause neural tube defects

4. 3 CO32- is A carbonate B bicarbonate C carbonic acid D carbon dioxide

5. 4 Which of the following steps of the Nitrogen cycle is anaerobic: A Ammonia turning into Nitrite B Nitrite turning into Ammonia C Nitrate turning into Nitrogen gas D Nitrite turning into Nitrate

6. 5 At any given time 30% of the global population is infected with which of the following: A tapeworms B ascaris C platyhelminthes D trichinella

7. 6 Which of the following is an example of molecular dissociation: A H+ + OH- --> H2O B H2O --> H+ OH- C Fe + CuSO4 --> Cu + FeSO4 D AgNO3 + HCl --> HNO3 + AgCl

8. 7 What is the ratio of carbon to nitrogen to phosphorus that is ideal for bacterial growth: A 1:10:100 B 100:10:1 C 100:1:10 D 10:1:100

9. 8 A bacterium that undergoes a period of severe stress will form a ________ to keep its offspring alive. A cyst B capsid C oocyst D spore

10. 9 DBPs are the direct result of A human waste being dumped into the water B nitrate runoff from agricultural fertilizer C byproduct formation from disinfectants D oxidation of nitrites in sewage lines

11. 10 All of the following are reasons why bacteria form biofilms EXCEPT: A Bacteria excrete adhesive cells to a surface to prevent the colony from being swept away B Bacterial biofilms allow for colonies to grow large enough to prevent phagocytosis C Bacterial biofilms alter the BOD of a system to prevent asphyxiation of higher level organisms D Bacterial biofilms allow the organisms to remain in favorable niches

12. 11 As the reaction from carbonic acid to carbonate progresses, which of the following would occur. A The concentration of CO2 would increase B the pH of the system would increase C the pH of the system would decrease D the concentration of suspended carbon dioxide would increase

13. 12 HCO3- is A carbonate B bicarbonate C carbonic acid D carbon dioxide

14. 13 Approximately _______% of the planet's water is fresh water. A 2.5 B 10 C 25 D 46

15. 14 Which of the following reactions is responsible for fixing nitrogen: A NH4+ --> NO2- B NO2- --> NO3- C NO3- --> N2 D N2 --> NH4+

16. 15 Prochlorococcus are A responsible for 90% of the net primary production B responsible for 50% of the net primary production C responsible for 50% of cellular respiration in the ocean D mostly barophilic

17. 16 Out of the small percentage of the planet's water that is fresh water, what percent can be found in ground water sources such as aquifers: A 68% B 50% C 44% D 30%

18. 17 Microbes account for about ________% of all the biological mass on Earth. A 98% B 75% C 50% D 22%

19. 18 Which of the following would be found on a hydrothermal vent: A A psychrophilic bacterium B A psychrotolerant bacterium C A barophilic bacterium D A barotolerant bacterium

20. 19 H2CO3 is A carbonate B bicarbonate C carbonic acid D carbon dioxide

21. 20 Which of the following is FALSE about thermal pollution: A An increase of temperature causes a decrease in DO B An increase in temperature yields an increase in secondary consumers C An increase in temperature causes an increase in bacterial growth D Thermal pollution is often a result of using water sources to cool water/equipment associated with power plants

22. 21 Which of the following describes the behavior of a hydrophobic substance: A A solution that easily mixes into salt water B A salt sample is added to fresh water & it quickly dissolves C A solution is added to a water sample and the solution floats on top of the water D A large sample of sugar is added to fresh water, but does not dissolve until heat is applied to the mixture

23. 22 The removal of toxins, such as mercury & petroleum oil, by natural or man-made microbes is called: A bioaccumulation B remedioaccumulation C accumuloremediation D bioremediation

24. 23 Which of the following is NOT true about oxygen depleting contaminants: A If oxygen is depleted in natural water sources, most aquatic life will die B Organic compounds are a required reactant C If oxygen is depleted in natural water, there will be a spike in the concentration of CO2 D Oxygen depleting wastes have more bacteria as products than as reactants

25. 24 Which of the following is a likely result of a massive increase in biochemical oxygen demand of a body of water: A Asphyxiation of higher level organisms such as fish B Asphyxiation of photosynthetic organisms C An increase in higher level organisms such as fish D An increase in higher level organisms such as dolphins and whales

26. 25 You discover an Achaea bacteria that is both barophilic and psychrophilic. This organism’s prime niche is most likely: A At the bottom of the ocean near a hydrothermal vent B At the bottom of the ocean far away from a hydrothermal vent C On the surface water of the ocean near shore D On the surface water of the ocean away from the shore