Unit 2 test Crossword
                                    
                                    
                                    
                                    
                                    
                                    
                                    
                                    
                                    
                                    
                                    
                                    
                                    
                                    
                                    
                                    
                                    
                                    
                                    
                                    
                                    
                                    
                                    
                                    
                                    
                                    
                                    
 
 
Down: 1) dust, smoke2)  occurs when excessive organic matter enters the environment.3)  occurs when excessive organic matter enters the environment. Across: 4)  introduction of chemicals into the environment that are not naturally present.5) oil spills, air pollution6)  the degradation of water quality caused by significant changes in water temperature due to human activities. It falls under the category of heated or cooled water pollutants.7) power plant coolant water8)  contamination of the physical, chemical, and biological components of the environment.
 

 

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