What is a pine tree categorized as?
A. pteridophyte
B. bryophyte
C. angiosperm
D. gymnosperm
E. bryosperm
D
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Which of the following about improvements in air quality is correct?
A. Ozone levels have decreased greatly because there is less nitrogen gas in the atmosphere. B. Lead emissions have decreased greatly because of the use of catalytic converters which remove lead from vehicle exhaust. C. Carbon monoxide emissions have decreased greatly because carbon monoxide is destroyed by oxygen in the atmosphere. D. Sulfur dioxide emissions have decreased greatly because power plants were required to reduce their emissions which caused acid deposition.
Where do dense water masses form?
A) ?near polar continental shelves B) ?along the equatorial zone C) ?in enclosed basins where river runoff is great D) ?along active continental margins
Which climate designation would you assign to a location that is wet in winter but dry in summer; long, hot summer and short, intermittent cold season?
A. Csb B. Cfb C. Csa D. Cfa
The study of Earth's atmosphere is known as ________
A) oceanography B) astronomy C) cosmology D) meteorology