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Select the best answer for each question.
exist in which form normally?
a) Negative ions
b) Neutral molecule
c) Neutral atom
d) Positive ions
are used by which of the following?
d) All of the above answers are correct
3. Fish excrete
nitrates in the form of what compound?
c) Hydrogen hydroxide
answer choice uses nitrates to stimulate growth?
b) Inert elements
nitrates in the water do NOT cause which of the following?
a) Fish to grow more rapidly
b) Algae to grow unchecked
c) Fish to be stressed and stop feeding
d) Unstable dissolved oxygen levels in the water
that there is an excess of nitrates in a body of water and algae
grow unchecked across the surface of the water, what is the major
effect that this will have on the water?
a) The algae will make the water clear
b) The algae will turn the water purple
c) The algae will block the sunlight from reaching down into the
d) The algae will increase the amount of sunlight that reaches the
bottom of the water
7. What human
actions cause nitrates to get into ground water?
a) Spreading too much commercial fertilizers on farmland
b) Allowing septic tanks to overflow
c) Allowing untreated water from a sewage treatment plant to enter
d) (a), (b) and (c)
of the following is NOT a characteristic of nitrates?
a) Soluble (able to dissolve) in water
b) Appears white in water
9. What is
the name of a disease that babies can get from drinking water containing
large amounts of nitrates?
a) Lipid-baby syndrome
b) Blue-baby syndrome
c) Cry-baby syndrome
d) Silver-baby syndrome
the presence of excess nitrates in water is harmful?
d.) a.) and b.)