51. What is the name of the process by which water is treated to remove contaminants and make it safe to drink?
a) Disinfection
b) Filtration
c) Purification
d) Chlorination
52. Which of the following is not a characteristic of a healthy river ecosystem?
a) High levels of dissolved oxygen
b) Abundance of fish and other aquatic life
c) Excessive nutrient runoff from agricultural activities
d) Clean water
53. What is the name of the process by which water is evaporated from the surface of oceans and other bodies of water and carried into the atmosphere?
a) Precipitation
b) Runoff
c) Infiltration
d) Evaporation
54. Which of the following is not a way in which water is used in industry?
a) Cooling of machinery and equipment
b) Processing of food and beverages
c) Irrigation of crops
d) Production of energy from hydropower
55. What is the name of the process by which water is heated and converted into steam to generate electricity?
a) Hydroelectric power generation
b) Nuclear power generation
c) Geothermal power generation
d) Thermal power generation
