The fact that at any time during the year, the Earth's axis is parallel to its orientation at all other times is called its parallelism, or ________
A) revolution
B) rotation
C) polarity
D) aphelion
E) perihelion
Answer: C
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City A averages 2000 heating/cooling degree-days for the year and City B averages 3000. In which city would you expect to pay higher utility bills?
A) City A B) City B
Which of the following does NOT have major areas of desert climate?
a. the Sahara b. Turkestan c. Indonesia d. Australia
What is the greatest source of oxygen in deep water?
A) The respiration from bacteria B) The lack of large quantities of organisms C) Chemosynthesis D) Polar waters that have sunk from the surface
Approximately 4 million __________ who live across Europe have no country or region of their own and are an Indo-European group that probably migrated from India into southeastern Europe around or before 1100 CE
Fill in the blank(s) with correct word