Which one of the following applies to a valley glacier that lengthens (extends the position of its terminus downslope) over a period of many years?
A) wastage exceeds accumulation B) accumulation and wastage are about equal
C) accumulation exceeds wastage D) none of the above
C
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Which of the following is a key part of the formation of most natural arches?
A. volcanic eruptions B. jointing and other fracturing C. spheroidal weathering D. folding of soft rock layers E. None of these choices are correct.
Which of the following is not a factor that is contributing to the decline in amphibian populations?
a. habitat loss and fragmentation b. viral and fungal diseases and parasites c. increase in UV radiation d. prolonged drought e. hunting of frogs for froglegs, a delicacy that is served in restaurants
Compare the position of Chicago, Illinois, in Figure 18.6(a) to the world climate map inside the back cover of this lab manual. What climate classification border is closest to Chicago, Illinois, under current and projected conditions? Describe its future relations to conditions on this map.
Present location: Projected location:
The spring equinox in the Northern Hemisphere occurs on ________
June 21 March 21 September 21 December 21