The basic building block of silicate minerals is the silica ____________________. Fill in the blank(s) with the appropriate word(s)
tetrahedron
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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.
A smaller fetch results in wind waves of greater height and energy
a. True b. False Indicate whether the statement is true or false
During the end Permian mass extinction, the slowing of sea floor spreading resulted in an increase of the world's ocean basins, causing sea level to drop about ________.
A. 150m (492ft) B. 100m (328ft) C. 75m (246ft) D. 200m (660ft)
Which of the following is "virtually certain" (99% certainty) to occur according to the IPCC?
A) Northern hemisphere spring snow cover will decrease. B) Ocean wave heights of mid-latitude storms will increase. C) High latitude precipitation amounts will increase. D) Ocean acidification will increase as atmospheric CO2 accumulates. E) Frequency of high precipitation will increase.