Department of Natural Sciences
Clayton College & State University
Morrow, Georgia

March 24, 2009

SCI 1901E - Quiz 13

Name __________SOLUTION_____________

(02)    1.         What beneficial role does ozone play in the upper atmosphere?

                        Ozone blocks ultraviolet radiation from reaching the surface and causing damage to living things.

(02)    2.         What is the chief culprit in the depletion of ozone in the upper atmosphere?

                         chlorofluorcarbons (CFCs)

(04)    3.         Select the single best answer in the following multiple choice question.

                         Thermal pollution is an unavoidable consequence of the generation of electricity at a fossil fuel or nuclear power plant because

a.         calcium sulfate sludge, produced in the removal of sulfur oxides from stacks, generates intense heat.

b.         the Second Law of Thermodynamics requires that waste heat must be produced.

c.         carbon dioxide, produced by the plant, acts as a greenhouse gas.

d.         the process of euthrophication heats water discharged from power plants.
 

(03)    4.         Label the sketch of a body of water in summer shown below to include the names of the two layers of water and the boundary
    between them

(04)    5.         Explain how thermal pollution can disrupt the normal winter behavior of a body of water.

Warm water added to the epilimnion prevents water in that layer from cooling and sinking during winter. 

This prevents mixing of the layers. 

Oxygen from the epilimnion does not reach the hypolimnion, and nutrients from the hypolimnion do not reach the epilimnion.