Astronomical causes of climate change occur with cycles of:
A) 1 - 5 million yrs.
B) 450,000 yrs.
C) 26,000 - 100,000 yrs.
D) 100 million yrs.
E) 20,000 yrs.
C
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If an increase in a deer population depletes the animals' food supplies, leading to a decrease in population back toward the original number, this would be an example of a positive feedback
a. True b. False Indicate whether the statement is true or false
Normal sea level pressure has a value of
A) 1013.2 millibars. B) 500 mb. C) 28.50 inches of lead. D) 32.01 millibars of mercury.
Which of the following is mainly responsible for red sunsets, blue moons, and milky white skies?
A. reflection of light B. dispersion of light C. refraction of light D. scattering of light
The moment magnitude is more accurate than the classical Richter scale because it is tied directly to physical parameters such as fault-rupture area, fault slip, and energy release, and because other earthquake scales use indirect measures such as how much a seismograph needle moves.
Answer the following statement true (T) or false (F)