Describe what VOCs are. What are some examples of VOCs?
What will be the ideal response?
ANSWER: Volatile organic compounds (VOCs) represent a class of organic compounds that are mainly hydrocarbons— individual organic compounds composed of hydrogen and carbon. At room temperature they occur as solids, liquids, and gases. Although thousands of such compounds are known to exist, methane (which occurs naturally and poses no known dangers to health) is the most abundant. Other volatile organic compounds include benzene, formaldehyde, and some chlorofluorocarbons.
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A boxer's punch hits with more force when striking a
A. lighter opponent. B. heavier opponent. C. same either way. D. none of the above
How many gallons of gasoline would be saved during the next 10 years if a driver were to change her existing car with a 25-mpg fuel efficiency to a more efficient car with an average fuel economy of 40 mpg? Assume she drives her car about 12,000 miles per year.
What will be an ideal response?
The __________ ____________ or Wailing Wall, as it is known to non-Jews, is the most sacred site in the world accessible to Jews
Fill in the blank(s) with correct word
________ is composed of alternating bands of light and dark silicate minerals
A) Marble B) Gneiss C) Mica schist D) Phyllite