Unit #3 Quiz #4, Grade: «grade» Subject: «subject» Date: «date»

1HCO 3 - is A carbonate B bicarbonate C carbonic acid D carbon dioxide

2All 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

3CO 3 2- is A carbonate B bicarbonate C carbonic acid D carbon dioxide

4Which of the following is an example of molecular dissociation: A H + + OH - --> H 2 O B H 2 O --> H + OH - C Fe + CuSO 4 --> Cu + FeSO 4 D AgNO 3 + HCl --> HNO 3 + AgCl

5Which 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

6Out 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%

7DBPs 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

8Which of the following is NOT a protist: A Hydra B Amoeba C Euglena D Paramecium

9Microbes account for about ________% of all the biological mass on Earth. A 98% B 75% C 50% D 22%

10At a neutral pH, which molecule is in the highest concentration A carbonate B bicarbonate C carbonic acid D carbon dioxide

11What 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

12You leave a petri dish full of universal nutrients exposed to the air in the classroom for 24 hours, and then incubate the dish for 48 additional hours. When you type the bacteria found within dish, you discover that there is a very high concentration of two different types of bacteria. This is an example of: A High species richness B High species abundance C Both high species abundance and species richness D Both low species abundance and species richness

13Which 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

14 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

15Which of the following makes up the smallest percent of global freshwater: A glaciers B permafrost C groundwater D surface & atmospheric water

16Hydrophilic means A "water changing" B "water hating" C "water fearing" D "water loving"

17H 2 CO 3 is A carbonate B bicarbonate C carbonic acid D carbon dioxide

18Which of the following describes a microbe's prime niche A An environment that has a high amount of competition for resources B An environment that has enough nutrients for the microbe to survive C An environment that has enough nutrients for the microbe to thrive D An environment that lacks any usable nutrients and is inhospitable to microbes

19Approximately _______% of the planet's water is fresh water. A 2.5 B 10 C 25 D 46

20Which element is always associated with organic compounds: A salt B carbon C oxygen D hydroxide