How do volcanic eruptions affect Earth's temperature?
What will be an ideal response?
Explosive volcanic eruptions eject large volumes of volcanic ash and sulfurous aerosols into the atmosphere, both of which block or absorb incoming solar radiation to cause cooling. The aerosol effect is the greater one because the aerosols can be distributed throughout the atmosphere and remain there for many years; most of the ash particles settle out within days or weeks and are only present in areas downwind of the volcano.
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Define acid deposition, and explain its causes and effects
What will be an ideal response?
Groundwater consists of all the water that lies on the surface of the ground
Indicate whether the statement is true or false
What federal legislation passed in 1980 regulates the cleanup of hazardous waste sites?
What will be an ideal response?
In terms of the total global supply of water, how much of it is in circulation at any one time?
A) None of it B) A small percentage C) Half of it D) Most of it E) Impossible to estimate