Earth's internal structural layer with the highest material density is the:
a. mantle.
b. outer core.
c. asthenosphere.
d. crust.
e. inner core.
E
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Maroon societies
A) usually had the official blessing of colonial governments. B) existed only in the Caribbean islands. C) were made up of indentured servants who completed their work terms. D) allowed the perpetuation of African culture. E) usually included blacks and whites.
________ is the study and reconstruction of past climates through the use of proxy data
A) Climatology B) Hydrology C) Glaciology D) Paleoclimatology
Thunderstorms that produce tornadoes?
a. ?have very little cloud-to-ground lightning. b. ?have updraft velocities that exceed 100 miles per hour. c. ?have rotating updrafts. d. ?will not produce hail. e. ?do not exist.
Shoreline retreat is a natural process that humans have made worse in recent years. Which of the following is NOT a major factor in the rate at which shorelines move inland?
A. coastal development B. sea-level rise C. frequency of storms D. disruptions in sediment supply