Chapter12rev - Chapter 12 Review Christian Smith 1 steppes...

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Chapter 12- Review Christian Smith 1. steppes are vast, slightly dry to semiarid plains and grasslands that are transitional between humid lands and much drier, true deserts. 2. Both result from prevailing high atmospheric pressures and descending wind patterns. As air masses descend, they are compressed and warmed, resulting in a drop in relative humidity. Low relative humidities mean that evaporation potential is high and precipitation is unlikely. 3. The Northern Hemisphere 4. Because the temperature of the area is another main factor. Precipitation in relation to evaporation is the true determining equation. 5. Weathering rates are accelerated by persistently high levels of moisture, because many of the chemical weathering reactions involve solutions. 6. Rivers flowing across humid lands generally show increased discharges downstream as they are joined by perennial tributaries. However, rivers that flow from humid lands into desert regions commonly show decreased
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  • Spring '13
  • NguyenVanVuong
  • Precipitation, barchanoid dunes, B. transverse dunes

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