Soot particles ("black carbon aerosols") generally cause ________ of Earth's atmosphere by ________ solar energy
A) cooling; absorbing
B) warming; absorbing
C) warming; reflecting
D) cooling; reflecting
E) cooling; radiating
B
Environmental & Atmospheric Sciences
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The 360-million-year-old Acanthostega ____
A)had limbs but could not walk on land B)had limbs and could walk on land C)lived entirely on land D)had no limbs but lived on land E)lived entirely in water
Environmental & Atmospheric Sciences
About what percentage of the workforce of North America is currently employed in the primary or secondary sectors of the economy?
A) 5% B) 20% C) 40% D) 50%
Environmental & Atmospheric Sciences
If the energy content of an object continually increases, its temperature will:
a. increase. b. decrease. c. rise and level off. d. stay the same.
Environmental & Atmospheric Sciences
By 2050, the population of Latin America and the Caribbean is estimated to reach about ________ million
A) 200 B) 440 C) 525 D) 725
Environmental & Atmospheric Sciences