Different isotopes are useful in different dating processes. Suppose we wished to determine the age of an object which we suspect to be approximately 10,000 years old. An isotope with which of the following half-lives would be most appropriate for this project?
A) 50 years
B) 500 years
C) 5,000 years
D) 50,000 years
C
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Which statement is not true of the relationship between latitude and ocean characteristics?
A) The temperature in temperate waters is considered to be the most variable. B) Tropical waters are the only regions in which evaporation exceeds precipitation. C) Temperate waters have the largest variation in salinity. D) The polar waters have the lowest average salinity due to the melting of ice.
Deposits made directly by a glacier consist of
a. clay. d. silt. b. well-sorted sediment. e. poorly sorted sediments. c. sand.
What process converts atmospheric carbon to organic carbon?
A) Transpiration B) Evapotranspiration C) Photosynthesis D) Respiration
The mid-ocean ridges and rises are spreading centers where new oceanic crust is created
a. true b. false