The sun spot cycle lasts about 11 years
Indicate whether the statement is true or false
T
Environmental & Atmospheric Sciences
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Minerals are composed of
A) silicon compounds. B) common types of rocks. C) elements joined as compounds. D) homogeneous solids.
Environmental & Atmospheric Sciences
If sediment is from natural sources, why is it considered a water pollutant?
A) it is an out-of-place resource B) it is toxic at its source, so it is also toxic in the water C) it is usually laden with mercury D) it is only a pollutant if it contains agricultural chemicals
Environmental & Atmospheric Sciences
Which fuel source has declined the most since the 1900s?
A) coal B) hydropower C) wood D) geothermal E) natural tas
Environmental & Atmospheric Sciences
Which of the following is NOT a greenhouse gas?
a. carbon dioxide b. methane c. water vapor d. nitrous oxide e. argon
Environmental & Atmospheric Sciences