Energy cannot endlessly cycle through living systems, because energy is ONLY PARTIALLY transferred.
Learning will increase, stress will decrease, sleep deprivation will decrease, sex will increase, getting older will decrease, and running will definitely increase.
I believe A. Nitrogen is the most abundant Gas.
The correct answer is circular. Copernicus and other astronomers before him thought that celestial bodies followed a circular orbital path. Copernicus was a Polish astronomer that concluded that the sun is at rest near the center of the universe and the earth is revolving around it annually. This theory is called heliocentric.
