The earth formed approximately ________ years ago
A) 5,000
B) 11,000,000
C) 4,600,000,000
D) 13,700,000,000
E) 33,200,000,000,000
C
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The Holocene
A) saw a gradual warming trend at its beginning. B) saw only one period of cooling. C) saw sea levels rise during its early times. D) was a transfer from an interglacial period to a glacial period.
A pair of protons in an atomic nucleus repel each other, but they are also attracted to each other. Why?
A. The pair repel each other by nuclear force but attract one another by an electrical force. B. Although it is known that protons repel each other at short distances because of like charge, it is not known what actually holds protons together in the nucleus because we have never seen the nucleus of an atom. C. The pair attract each other by nuclear force but also repel one another by a weaker electrical force. D. The pair repel each other since they are both positively charges but they are held together by much stronger forces known as quarks.
Which of the three latitudes would receive the highest insolation on 12/22?
If the angle of incidence (based on the solar altitude at noon) were the only factor influencing average daily insolation at the surface.
What will be an ideal response?
In which location does a water molecule have the longest residence time?
A) a river B) snow in Nebraska C) atmosphere D) ocean E) All water molecules have equal residence times.