A prairie was covered by grasses and wildflowers. A farmer removed this native vegetation so he could plow the land and plant crops. For years, normal rain fell and the farm thrived
But after a few years of drought, the crops died and the topsoil on the farm eroded. Explain how the farmer's use of the land led to the erosion that occurred there.
While the native plants were adapted to drought conditions of the plains, the crops that the farmer planted could not withstand the drought and they died. When the crops died, plant roots no longer held the soil in place. Wind and running water could lift and carry the topsoil away.
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One of the reasons why tornado frequency is lower in Europe than in North America is
A) the Gulf Stream encourages the clash or warm and cold air. B) east west trending mountains inhibit the clash of warm and cold air. C) lower population densities and storm reporting capabilities. D) higher than normal temperatures due to the presence of the Gulf Stream.
The greater the difference in air pressure, the ________
A) more horizontal the wind direction B) more vertical the wind direction C) faster the wind speed D) slower the wind speed
In the space provided, sketch a diagram of the three-cell model of global circulation and label the following features: ITCZ, subtropical high (x2), subpolar low (x2), polar high (x2), NE Tradewinds, SE Tradewinds, westerlies (x2), polar easterlies (
x2)., Hadley cells (x2), Ferrel cells (x2), Polar cells (x2).
n regions with low rates of precipitation and high rates of evaporation, the halocline will __________.
-decrease in salinity with depth -not exist -increase in salinity with depth -increase in density with depth