What is the circle of illumination and its importance?
What will be an ideal response?
The circle of illumination is the dividing line between day and night. Combined with the four factors that cause the seasons, the circle of illumination will influence daylength throughout the year.
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Mountains define most of the boundaries between all the following, except
A) Italy & Switzerland. B) France & Spain. C) US & Mexico. D) India & Nepal. E) Austria & Switzerland.
What is the best definition of "maximum sustainable yield"?
A) planned obsolescence B) production consistent with maintaining future productivity of a renewable resource C) generation of maximum profits possible while sustaining the current amount of population D) looking for alternative methods of production (redirecting investment into new technologies) E) using separate production techniques and matching them to the appropriate local skill levels
Corn-produced ethanol ________
A) does not require inputs of fossil fuel energy B) does not produce greenhouse gases when burned C) results in higher food prices for corn and corn products D) yields more than 10x the energy required to produce it E) cannot be mixed with other fuels
At any given moment, what percentage of Earth is cloud-covered?
A) 5 B) 25 C) 50 D) 75 E) 90