What were some of the reasons why the Russian government decided to sell all of its North American territory to the United States in the 1840s?
What will be an ideal response?
Russian trappers had to compete with British and American competition and declining populations of fur-bearing animals due to overhunting. The Russian government made the decision that involvement in North America was no longer profitable.
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pH is a measure of the comparative amounts of hydrogen and hydroxide ions contained in a particular volume of solution, which influences the uptake natural chemicals in soil by plants.
Answer the following statement true (T) or false (F)
Cross-bedding can form via wind or water currents
a. True b. False
The typical percentage of high-quality energy loss in transfers from one trophic level to the next is about ____.
A. 1% B. 5% C. 35% D. 60% E. 90%
Spheroidal weathering refers to:
a. tiny broken pieces of rock. b. rounded boulders left by weathering along joints. c. rounded holes or caves left in sandstone cliffs due to hydration. d. rounded rocks split into two halves by thermal expansion and contraction weathering. e. weathering by round salt crystals.