Which of the following is the major source of outdoor air pollution?
A. burning of fossil fuels
B. volcanoes
C. agricultural activities
D. meteorite impacts
Answer: A
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Cycads evolved during the Triassic. Indicate whether the statement is true or false
What is the latest supercontinent?
a. Supercontinent Laramide b. Supercontinent Pannotia c. Supercontinent Rodinia d. Supercontinent Pangaea
The formulas Mg2SiO4 and Fe2SiO4 represent:
a. two separate minerals b. two minerals that have related physical properties c. two nonrelated minerals d. two end members of a solid solution series
The heat index (HI) is used by the National Weather Service, and combines ____ with ____ to determine an apparent temperature
a. dew point temperature; mixing ratio b. mixing ratio; saturation vapor pressure c. actual vapor pressure; specific humidity d. air temperature; relative humidity e. air temperature; specific humidity