geol 1020hw5

geol 1020hw5 - Homework #5, Geol 1020, Spring 2008 1. Which...

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Homework #5, Geol 1020, Spring 2008 1. Which of the following describes orbital Precession? A. a measure of the erratic behavior of global climate B. angle at which the earth’s rotation axis is tilted C. variation in how circular the earth’s orbit is about the sun D. variation in how much the earth “wobbles” about its spin axis E. the exactness to which we can predict the earth’s position about the sun 2. In class we discussed how an explanation for glacial cycles must explain a variety of observations. Milankovitch orbital parameters explain all but one of the following. Which one is that? A. oscillations between different climatic extremes B. climatic variation on the scale of 20,000 to 100,000 years C. rapid changes from one climate regime to another D. predictable periodicity to climate cycles 3. Part of the Pleistocene isotopic record is shown below. Which of the three orbital Milankovitch parameters dominants the last 150,000 years? A. Eccentricity B. Obliquity C. Precession Fill in the blank with a number rounded off to the nearest hundredth. -- Four different interglacial (i.e., warm climate) peaks are labeled on the curve above. Peak I occurred at 170,000 years ago; peak IV occurred at
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geol 1020hw5 - Homework #5, Geol 1020, Spring 2008 1. Which...

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