Chapter 11.3 Flashcards
What are 5 ways water quality is reduced?
Turbidity, acidity, salinity, temperature, and other dissolved substances
How can we test the turbidity of water?
You can see the turbidity of water by looking at it. Scientists measure turbidity by lowering a two colored dial into the water until it is no longer visible. Then, they measure the depth.
How can we test the temperature of water?
Warm water has less dissolved oxygen than cold water. Increasing water temperature artificially is called thermal pollution. Thermal pollution reduces the quality of water.
How can you test the acidity of water?
Water is acidic if it has sulfuric acid or nitric acid. We measure the acidity of water by using an indicator. Water is acidic if it’s pH is below 7 and basic if it’s pH is above 7. Good quality water usually has a pH between 6 5 and 8.5.
How can we measure the salinity of water?
A conductivity apparatus tests whether a solution can carry an electric current. Salt water is a good conductor of electricity. Testing a water sample for conductivity will tell you whether the solution contains salt.
How can you test water for other dissolved substances?
Other dissolved substances include chlorine, nitrates, iron and copper, and calcium and magnesium. Chemically treated paper strips can show whether or not a chemical is present in the water.
