An important tool in understanding the actual numerical dates of past geologic events is ________
A) cross-cutting relationships
B) unconformities
C) depositional rates
D) radioactivity
E) fossils
D
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Central place theory holds that the size and spacing of urban areas is a function of
A) government planning. B) historical development of religious centers. C) where people go to purchase goods and services. D) the specific types of economic activity in the overall area studied.
Nearshore productivity is almost always more productive than open ocean productivity. Indicate whether the statement is true or false
Objects that are good absorbers of radiation are usually poor emitters of radiation
Indicate whether the statement is true or false
Which process acts to remove carbon dioxide from the atmosphere?
a. Lightning b. deforestation c. photosynthesis d. burning fossil fuels e. volcanic eruptions