Describe and explain the distribution of soil orders across the United States
What will be an ideal response?
Across the United States, there is a soil gradient, one which largely corresponds to climate. To the West of the 98th meridian, Aridisols dominate large swaths of the continental U.S. As one moves east, Mollisols dominate large portions of the area known as the Great Plains. Further to east, Alfisols dominate. In the southeast, Ultisols dominate, whereas Spodosols dominate in the far northeast and northwest. There are bands of Andisols in the northwest and eastern California. Gelisols are typically restricted to portions of Alaska. Entisols are widely distributed with no real pattern. Histosols are confined to the upper midwest, while Inceptisols are found in the Appalachians and elsewhere.Vertisols are found in various areas, but not widely distributes. Lastly, Oxisols are rare, if not non-existent in the U.S.
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Which of the following statements describes an acidic solution?
A) [H3O+] > [OH-] B) [H3O+] < [OH-] C) [H3O+] × [OH-] ? 1 × 10-14 D) [H3O+]/[OH-] = 1 × 10-14 E) [H3O+]/[OH-] = 1
Rust has a tendency to form when iron in contact with water reacts according to the following reaction: 4 Fe + 3 O2 ? 2 Fe2O3 What is happening at the anodic region?
A) Iron is being oxidized. B) Oxygen is being oxidized. C) Oxygen is being reduced. D) Iron is being reduced. E) none of the above
During the Triassic, a number of rift-related fault basins formed along the eastern margin
of North America. Indicate whether the statement is true or false.
DDT
A. became highly concentrated in carnivorous fish and birds. B. affected insects but had little effect on humans. C. was a persistent pesticide. D. All of the statements are correct. E. None of the statements are correct.