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1Define pollutant.


2________ is caused by pollutants such as nitrates and sulfates combining with water to form acids that are present in precipitation.


3In today's lab, you will examine how acidic conditions that simulate acid rain affect:
A)brine shrimp
B)leaf growth
C)seed germination
D)a and b
E)a and c


4In the procedures on the effects of acid rain, what is the control?


5________ is a process of nutrient enrichment of aquatic systems that occurs when nutrients are washed from the soil by rain.


6Human-generated pollutants such as raw sewage and fertilizers dramatically speed eutrophication.
A)True
B)False


7Pesticides generally break down before being washed into the drinking water.
A)True
B)False


8Thermal pollution decreases the oxygen supply in water because warm water holds less oxygen than cool water.
A)True
B)False


9In the procedures on the effects of pesticides and thermal pollution, what organism will you study?
A)brine shrimp
B)green algae
C)paramecium
D)amoeba


10________ are assays that measure the growth of the roots of common onions exposed to suspected pollutants.


11For the Allium Test procedure, what is your independent variable?


12Surface water may contain large amounts of algae. Describe two negative effects of these algae on our drinking water.


13For the procedure that examines the effect of algal pollution on water supplies, what is your dependent variable?
A)presence of toxins produced by algae
B)concentration of algae
C)species of algae
D)a and b
E)a and c


14Describe three ways that pollution affects your life.





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