?What is a secondary pollutant?
Fill in the blank(s) with the appropriate word(s).
Primary pollutants are chemicals or substances emitted directly into the air from natural processes and human activities at concentrations high enough to cause harm. While in the atmosphere, some primary pollutants react with one another and with other natural components of air to form new harmful chemicals, called secondary pollutants.
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Which characteristics distinguish a law from a theory? Check all that apply.
A. A law begins as a testable hypothesis. B. A law may be demonstrated mathematically. C. A law is a statement of fact. D. A law is only an explanation of observations. E. A law is accepted as true based on a few experiments with similar results.
1101 UTC Convert the following time from UTC to the indicated U.S. time zones:
Which of the following is NOT a controlling factor of climate?
A) the uneven distribution of land and ocean B) elevation C) diurnal changes in solar radiation D) prevailing atmospheric and oceanic circulations
The ozone layer is found in the
A. stratosphere. B. thermosphere. C. troposphere. D. mesosphere.