How do septic systems work to make sewage safe for use as water? What will be an ideal response?
Septic tanks dispose of sewage in many areas. A septic tank slowly releases sewage into the ground,
where it is decomposed by oxidation and microorganisms and filtered by the sediment as it percolates
through the zone of aeration. By the time the sewage has reached the zone of saturation, it has been
cleansed of any impurities and is safe to use if the water table is not close to the surface.
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When the Comprehensive Environmental Response, Compensation, and Liability Act (CERCLA) several additional laws were passed to fix problems that arose as a result of enforcing CERCLA. Which of the following statements is correct?
A. Superfund Amendments and Reauthorization Act (SARA) established the innocent landowner defense. B. The Small Business Liability Relief and Brownfields Revitalization Act (SBLRBRA) allowed certain abandoned hazardous waste sites to be developed for a useful purpose. C. The Superfund Amendments and Reauthorization Act (SARA) protected those who purchased land from becoming responsible for unknown hazardous waste sites if they use proper methods of evaluating the property. D. All of these statements are correct. E. None of these statements is correct.
Banding within a speleothem is known as ________
A) stalactite rings B) pillars C) calcite domes D) cave decorations E) laminae
The interaction between a lion and a hyena fighting over a dead zebra on the African Savannah is best described as ____________________
Fill in the blanks with correct word
An important reason for the large daily temperature range over deserts is:
a. there is little water vapor in the air to absorb and re-radiate infrared radiation. b. the light-colored sand radiates heat very rapidly at night. c. dry air is a very poor heat conductor. d. free convection cells are unable to form above the hot desert ground. e. the ozone content of desert air is very low.