_______ (the destruction of the resilience and the biological potential of arid and semiarid ecosystems) is an unnatural and human-induced change that has been quite common in the Sahel region for the last several decades
Fill in the blank(s) with correct word
Desertification
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According to the three-cell general circulation model, which of the following can be expected at the equator?
A. strong horizontal pressure gradients B. doldrums C. high winds D. a ridge of high pressure
For the reaction 2C ? A + B, 0.01 mol of A is formed during the first 15 seconds of the reaction. Assuming that the rate of reaction remains constant for two minutes, which of the following statements is true?
A) After 2 minutes 0.08 moles of B were produced. B) After 2 minutes 0.16 moles of C were consumed. C) both a and b D) neither a nor b
Springs may occur where the water table intersects the ground surface
Indicate whether the statement is true or false
The Earth is one of ________ planets in the solar system
A) four B) eight C) twenty D) thirty six E) over one hundred