Heaving is commonly accomplished by _____
a. oxidation
b. carbonation
c. alternating freezing and thawing
d. rockfall
e. talus
c
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The origin of amphibians from fish is an example of
a. microevolution. b. macroevolution
Which of the following is NOT a feature of what physical geographers study?
A. processes that created and changed the spatial distributions of natural features B. impacts of spatial distributions of the natural environment on people C. interconnections between different aspects of the natural environment D. All of these are features of what physical geographers study.
Four of the following are ecosystem services of rivers. Select the exception.
A. delivers nutrient to seas to help sustain fisheries B. purifies water C. renews and renourishes wetlands D. removes silt that accumulates in deltas E. provides habitats for wildlife
Which of the following best describes the Earth's average surface temperature for the past 900,000 years?
a. a steady warming trend b. fairly steady temperatures until recently c. many fluctuations of several degrees centigrade d. fairly steady with occasional cool spells e. fairly steady with a recent cooling trend