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Unit #3 Quiz #1 2013-2014. Grade:. «grade». Aquatic Science. Subject:. «date». Date:. 1. At a neutral pH, which molecule is in the highest concentration. A. carbonate. B. bicarbonate. C. carbonic acid. D. carbon dioxide. 2.

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slide1

Unit #3 Quiz #1 2013-2014

Grade:

«grade»

Aquatic Science

Subject:

«date»

Date:

slide2

1

At a neutral pH, which molecule is in the highest concentration

A

carbonate

B

bicarbonate

C

carbonic acid

D

carbon dioxide

slide3

2

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

slide4

3

Which of the following makes up the smallest

percent of global freshwater:

A

glaciers

B

permafrost

C

groundwater

D

surface & atmospheric water

slide5

4

Which of the following is considered an indicator species:

A

daphnia

B

hydra

C

diatoms

D

amoebas

slide6

5

Which of the following is NOT a protist:

A

Hydra

B

Amoeba

C

Euglena

D

Paramecium

slide7

6

When considering the carbonate buffering

system, all of the following reactions

involve hydronium, EXCEPT:

A

HCO3- --> CO32-

B

CO32- --> Limestone

C

H2CO3 --> HCO3-

D

CO32- --> HCO3-

slide8

7

H2CO3 is

A

carbonate

B

bicarbonate

C

carbonic acid

D

carbon dioxide

slide9

8

HCO3- is

A

carbonate

B

bicarbonate

C

carbonic acid

D

carbon dioxide

slide10

9

You 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

slide11

10

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

slide12

11

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

slide13

12

Microbes account for about ________% of all

the biological mass on Earth.

A

98%

B

75%

C

50%

D

22%

slide14

13

As carbonic acid becomes carbonate through

the carbonate buffering system, which

molecules are released

A

hydronium

B

hydroxide

C

carbonate

D

salt

slide15

14

Which element is always associated with

organic compounds:

A

salt

B

carbon

C

oxygen

D

hydroxide

slide16

15

At an average ocean pH (8), which molecule

is in the highest concentration

A

carbonate

B

bicarbonate

C

carbonic acid

D

carbon dioxide

slide17

16

Approximately _______% of the planet's water

is fresh water.

A

2.5

B

10

C

25

D

46

slide18

17

Which 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

slide19

18

Hydrophilic means

A

"water changing"

B

"water hating"

C

"water fearing"

D

"water loving"

slide20

19

CO32- is

A

carbonate

B

bicarbonate

C

carbonic acid

D

carbon dioxide

slide21

20

The following image demonstrates:

A

high species richness but low abundance

B

high species abundance but low richness

C

high species richness and high species abundance

D

low species richness and low species abundance