Protecting Earth's Waters Vocabulary Crossword
                                   
                                   
                                   
                                   
                                   
                                   
                                   
                                   
                                   
                                   
                                   
                                   
                                   
                                   
                                   
                                   
                                   
                                   
                                   
                                   
                                   
                                   
                                   
                                   
                                   
 
 
Down: 1) A chemical material or solution which can be used to show (usually by a change in color) the endpoint of a chemical reaction or chemical concentration. Examples are litmus and phenolphthalein.2) Their presence in water serves as a reliable indication of contamination from human sewage or animal droppings.They occur with intestinal pathogens that are dangerous to human health.3) Measure of water quality indicating free oxygen dissolved in water.5) pollution that can be traced to a specific source such as oil that spills from a pipeline6) a measure of the clarity of the water (how clear is it?)10) A flat, white disc lowered into the water by a rope until it is just barely visible. At this point, the depth of the disc from the water surface is the recorded secchi disc transparency.13) used to describe the health of a water system14) water that runs into drains that may contain sewage and chemicals from homes and businesses or pollutants from industry16) rating of how acidic or basic a substance is the scale goes from 0 to 14 with 7 being neutral values less than 7 being acidic and values greater than 7 being Across: 4) any substance or form of energy that can cause harm to the environment and make it unfit for use by organisms; any substance that can negatively affect an ecosystem5) the measure of how acidic or basic a substance the acidity neutrality or basicity of a substance7) responsibility for conserving and restoring the Earth’s resources for future generations8) nitrogen compounds used for growth by plants and algae; a compound that can be used by photosynthetic life forms to obtain the nitrogen needed for survival9) pollution that comes from many places or sources that is not easily identified; pollution that results from water flow picking up trash, toxic chemicals, and other types of waste11) nutrients flowing into an area12) organisms or components of organisms that are used to assess the health of a water system; an organism or community associated with particular environmental condition a change to the number of organisms or the proportions of the community indicate a change in the environment15) small, spineless creatures that are visible with the unaided eye; they include organisms such as crustaceans, mollusks, worms, and insects17) rock layer that stores water and allows water to flow through it18) Any foreign components in a substance, for example in water.
 

 

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