The degradation of land due to human action such as excessive crop planting, deforestation, and land grazing is
A) slash and burn agriculture.
B) desertification.
C) land desiccation.
D) commercial farming.
E) plantation farming.
Answer: B
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The most voluminous layer of Earth is the
A) crust. B) mantle. C) outer core. D) inner core.
Why might coating a metal with another metal that is harder to oxidize prevent the first metal from being oxidized?
A) It doesn't prevent it, but helps to slow it down. B) All of the oxidizing agent is consumed using up the easily oxidized metal. C) The metal that is coated is protected from moisture and oxygen so it doesn't react. D) The metal that is acting as the coating is protected from moisture and oxygen. E) all of the above
All life on Earth is fundamentally the same
a. True b. False
Use the schematic shown below to answer this question.
What causes the circular patterns?
A. Ocean salinity effects B. Ocean thermal effects C. Ocean thermal and salinity effects D. Winds