Once released into the atmosphere, chlorofluorocarbons remain about ____
a. 10-20 days
b. 50-100 years
c. 1-2 years
d. 1-2 month
e. 1000 years
ANSWER: b
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Which of the labels in the map below is where the Neotropic realm contains unique mammals and colorful birds?
A) A
B) B
C) C
D) D
Igneous rocks with a two-stage intrusive-extrusive origin are recognized by a texture that is:
a. aphanitic. b. porphyritic. c. glassy. d. phaneritic. e. pyroclastic.
Which statement is true about green taxes?
A. Seventy percent of voters support green taxes when they are explained. B. The U.S. Congress has introduced and passed green taxes under pressure from lobbyists. C. Green taxes fail reduce pollution and greenhouse gas emissions. D. Green taxes reduce economic competitiveness. E. Green taxes cost jobs.
Which of the following is true of meridians?
A. Meridians run from east to west. B. Meridians are always parallel to each other. C. The highest degree label for meridians is 90°. D. Meridians always follow great circles.