unit #3 quiz #5, 2013-2014
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Unit #3 Quiz #5, 2013-2014
Grade:«grade»
Subject:«subject»
Date:«date»
1 Which of the following is NOT released by hydrothermal vents
A heat
B large tube worms
C calcium ions
D iron ions
2 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
3 HCO3- is
A carbonate
B bicarbonate
C carbonic acid
D carbon dioxide
4 The difinitive host for Toxoplasmosis is:
A humans
B cats
C sheep
D cattle
5 Which of the following reactions is responsible for fixing nitrogen:
A NH4+ --> NO2
-
B NO2- --> NO3
-
C NO3- --> N2
D N2 --> NH3
6 What is the required 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
7 Which of the following is NOT a source of nitrates in water sources:
A A leaky septic system
B Runoff from an organic farm
C Animal waste
D Water plants & algae
8 Which of the following is the smallest living microbial contaminant:
A virus
B bacteria
C protozoan
D helminths
9 CO32- is
A carbonate
B bicarbonate
C carbonic acid
D carbon dioxide
10 Which chemical is commonly used to disinfect American water sources
A Chlorine
B Fluorine
C A combination of chloride & alcohol
D Ethyl-alcohol
11 Which of the following is NOT a correct statement concerning thermal pollution:
A A decrease in thermal pollution will cause an increase in DO
B A decrease in thermal pollution will cause an increase in bacterial growth
C An increase in thermal pollution will cause a decrease in DO
D An increase in thermal pollution will cause an increase in bacterial growth
12 Methemoglobinemia causes ________ to bind to _______, blocking the uptake of oxygen & causing problems such as “blue baby” syndrome.
A Ammonium, myoglobin
B Ammonia, hemoglobin
C Nitrate, myoglobin
D Nitrite, hemoglobin
13 Contamination of agricultural land by dissolved salts is problematic because:
A The permeability of the agricultural soil is greatly reduced
B The permeability of the agricultural soil is greatly increased
C The permeability of water used for irrigation is greatly reduced
D The permeability of water used for irrigation is greatly increased
14 A molecule that will slow down a reaction/maintain a reaction, such as the carbonate system helping to maintain aquatic pH is known as
A an acid
B a base
C a catalyst
D a buffer
15 Which of the following is the largest source of thermal pollution:
A Power plants using local bodies of water to cool off their equipment
B Plastics introduced during the chemical processing at energy plants
C Water run-off from residential streets that collect oil
D Water run-off from agricultural land
16 At any given time 30% of the global population is infected with which of the following:
A Trichinella
B Platyhelminthes
C Ascaris
D Tapeworms
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