At some Cretaceous-Paleogene boundary sites, the impact hypothesis is supported by the existence of ____
A)high concentrations of platinum
B)shock-metamorphosed quartz grains
C)dinosaur fossils
D)the absence of dinosaur fossils
E)high concentrations of volcanic rocks
B
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Unregulated populations tend to increase by ________
A) linear growth B) pyramidal growth C) exponential growth D) immigration E) emigration
The temperature increase with depth ____
A)is called the Moho B)is called the lithospheric inclination C)only occurs on continental plates D)rises more slowly beneath spreading ridges than elsewhere beneath the seafloor E)rises faster beneath spreading ridges than elsewhere beneath the seafloor
Complete the following concept map.
Complete the following concept map for number 1.
A. Biochemical B. Chemical C. Clastic D. Evaporation
Vertical and horizontal movement caused by the expansion of freezing water are called
A) frost heaving and frost thrusting, respectively. B) frost thrusting and frost heaving, respectively. C) frost heaving. D) frost thrusting.