Weathering is most intense in the
A. A-horizon.
B. B-horizon.
C. C-horizon.
D. parent material beneath a soil.
Answer: A
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Volcanic ash and dust can have the effect of ___
a) reducing the sunlight that reaches Earth's surface, suppressing photosynthetic processes b) reducing Earth's surface temperature c) damaging aircraft that fly through the dust d) causing unusual weather e) All of the previous answers are correct.
Populations can be isolated from one another by changes in ________.
A. temperature B. light C. salinity D. density E. All of these are correct.
Mercantile colonialism required huge migrations of people to extract the Earth's resources, including 30 million slaves and contracted workers from Africa, India, and China to work mines and plantations around the globe
a. True b. False Indicate whether the statement is true or false
A forecast of “chance of precipitation” means the probability of precipitation is
a. ?between 0 and 20 percent. b. ?between 30 and 50 percent. c. ?between 50 and 60 percent. d. ?between 60 and 70 percent. e. ?greater than 80 percent.