What is the “precession of the equinoxes,” and how does it affect glaciation? What will be an ideal response?
The Precession of the Equinoxes is one of the three aspects in the Milankovitch Theory of
Earth’s orbit that can affect the amount of solar radiation reaching Earth. The Equinoxes are the
times when the sun is directly over the equator. Currently, the aphelion occurs when Earth is
tilted toward the sun in summer, and the perihelion occurs when Earth is tilted away from the sun
in winter. However, in 11,000 years, Earth will be farthest from the sun in winter, causing colder
winters to occur
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Which feature on this diagram is a hanging valley?
A) 1, the circular depression at the head of the valley
B) 2, a lake in the upper valley
C) 3, a steep ridge
D) 4, a valley that is above the level of the main valley
Demographically speaking, the effects of AIDS are most significant because ________
A) AIDS strikes affluent people more than poor people B) it is caused by a virus C) AIDS sickens and kills the youngest and most productive members of society D) AIDS leaves behind orphans E) it is not known who is resistant to AIDS
The parts of Australia that are least subject to drought are
A. Around the coasts B. In the interior C. At Ayres Rock D. In the far west
An element found in another galaxy exists as two isotopes. If 80.0 percent of the atoms have an atomic mass of 80.00 atomic mass units and the other 20.0 percent have an atomic mass of 82
00 atomic mass units, what is the atomic mass of the element? A) 81.0 atomic mass units B) 64.0 atomic mass units C) 80.4 atomic mass units D) 16.4 atomic mass units E) 81.6 atomic mass units