Acid mine drainage occurs when surface water infiltrates which of the following? A) strip-mined coal beds B) spoil banks where w
ater chemically reacts with the minerals to create sulfuric acid C) spoil banks where chemical reactions occur with pyrite D) groundwater and surface water supplies E) none of the above
The correct option is C. Acid mine drainage refers to the outflow of acidic water from a mining site. This acidic water is usually formed as a result of the chemical oxidation of pyrite [iron sulphide, FeS2]which is often found together with valuable metals. Acid mine drainage occurs when water flow over or through sulfur bearing materials.
if you have headaches or migraines, your doctor may use a spinal tap to look for signs of infection, bleeding in the brain, to measure the pressure around your brain, or other things that could be causing your pain
The ten percent law states that the total energy content of a trophic level in an ecosystem is only about one-tenth (or 10%) that of the preceding level. The trophic levels of any ecosystem can be arranged in a pyramid shape to show the amount of energy available to support one trophic level to the next.