Water Pollution

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Across
  1. 5. an underground layer of rock that contains freshwater
  2. 6. water underground in the earth
  3. 7. a type of water pollution when the temperature is altered unnaturally
  4. 9. a substance released when fossil fuels are burned that contains sulfur and mixes with water to form acid rain
  5. 10. water on the surface of the earth such as in lakes and rivers
  6. 11. harmful substance not normally present
Down
  1. 1. any piece of plastic less than 5 mm in size
  2. 2. rain that is unusually acidic
  3. 3. creatures such as bacteria that are too small for the eye to see but can contaminate water and make people sick
  4. 4. wastewater from homes and businesses that travels through city pipes to a water treatment center
  5. 8. a nutrient needed for plant growth that is used in fertilizer but can harm water quality
  6. 10. small fractures where crude oil can escape from the earth's crust into the ocean