Secondary sewage treatment is designed primarily to ________
A) remove hazardous chemicals such as pesticides and heavy metals
B) pretreat wastewater on its way to tertiary treatment
C) remove the dissolved organic matter
D) remove all bacteria and microorganisms
E) remove the solids
C
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What is absolute dating, and what is it based on? What can absolute dating tell us? What will be an ideal response?
What may be an ecological implication of global warming?
A) In general, plants and animals will probably benefit from warmer temperatures. B) Plants and animals may not be able to move to a suitable habitat quickly enough. C) Since farmland may be lost, the habitats of plants and animals will increase in area. D) Plants and animals will adjust quickly to the changes in temperature and begin to replicate and reproduce in new areas. E) Since biodiversity is usually higher in warmer, milder climates, there will be little or no ecological implications.
Aside from avoiding geological hazards, why else do we study geology?
a. Geology is also studied to learn how to completely prevent geological hazards from occurring b. Geology is also studied to learn how to locate and extract resources that are necessary for life and industry c. Geology is also studied in an attempt to cause the global sea level to rise d. Geology is studied as a sole resource to place monetary values on precious metals e. Geology is studied as an attempt to figure out how to colonize other planets in the solar system
Which of the following products are formed when sodium reacts with water?
A) NaH + O2 B) NaO + H2 C) Na2O + H2 D) NaOH + H2