11-2 and 11-3 Vocabulary Questions Crossword
                                     
                                     
                                     
                                     
                                     
                                     
                                     
                                     
                                     
                                     
                                     
                                     
                                     
                                     
                                     
                                     
                                     
                                     
                                     
                                     
                                     
                                     
                                     
                                     
                                     
                                     
                                     
 
 
Down: 1) An artificial body of water that usually forms behind a dam2) The introduction into water of waste matter or chemicals that are harmful to organisms living in the water or to those that drink or are exposed to the water3) Bacteria and other impurities cling to the flocs, which settle to the bottom of a tank4) Pollution that comes from many sources rather than from a single specific site6) Chlorine is added to prevent bacteria from growing in the water7) Alum is rapidly mixed into the water and forms stick globs9) Suitable for drinking10) The process of removing salt from ocean water13) The source water supply is filtered to remove large organisms and trash14) Air is forced through the water to release unwanted gases, which reduces odor and improve taste Across: 5) Layers of sand, grave, and hard coal filter the remaining impurities8) A structure that is built across a river to control a river’s flow11) A method of providing plants with water from sources other than direct precipitation12) A process that increases the amount of nutrients in a body of water through human activities, such as waste disposal and land drainage15) Pollution that comes from a specific site16) A virus, microorganism, or other substance that causes disease17) In some communities, fluoride may be added to prevent tooth decay
 

 

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