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
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
What is the latest supercontinent?
a. Supercontinent Laramide b. Supercontinent Pannotia c. Supercontinent Rodinia d. Supercontinent Pangaea