The _______________ is the largest circle of latitude on Earth.
-prime meridian
-Tropic of Cancer
-Tropic of Capricorn
-equator
-none of these is correct
equator
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Climate is an important aspect of the physical environment because
a. it could be cold tomorrow. b. it completely controls the economy. c. it has such a significant influence on other aspects of the environment and influences many human activities as well. d. military forces depend on climate to win wars. e. the aviation industry depends on climate to fly planes.
There is little evidence supporting the contention that synthetic fertilizers disrupt natural biogeochemical cycles
Indicate whether the statement is true or false
The average momentum of a 70-kg runner who covers 400 m in 50 s is
A) 8.75 kg ? m/s. B) 57 kg ? m/s. C) 560 kg ? m/s. D) 5490 kg ? m/s.
What had the most influence in irreversibly changing the Earth's atmosphere?
a. Formation of carbonic acid in the ocean b. Production of oxygen from photosynthesis c. Chemical breakup of water vapor by sunlight d. Fluctuation in the atmospheric composition