Problem 2
Fill in the blanks with the correct vocabulary word or words. _________forms from organic matter such as leaves and roots.
Problem 3
Which soil horizon often has a dark color because of the presence of humus? A. E horizon C. B horizon B. Chorizon D. A horizon
Problem 3
Fill in the blanks with the correct vocabulary word or words. The horizons of a soil make up the __________.
Problem 4
Which of the following is an agent of chemical weathering? A. ice wedging B. burrowing animals C. carbonic acid D. growing tree roots
Problem 5
Which of the following might damage a soil's structure? A. a gentle rain C. earthworms B. organic matter D. compaction
Problem 5
Fill in the blanks with the correct vocabulary word or words. ____________ occurs when many materials containing iron are exposed to oxygen and water.
Problem 6
Fill in the blanks with the correct vocabulary word or words. __________means that crops are planted along the natural contours of the land.
Problem 6
In which of the following types of rock are caves most likely to form? A. limestone C. granite B. sandstone D. basalt
Problem 7
Fill in the blanks with the correct vocabulary word or words. __________ is the pattern of weather that occurs in a particular area for many years.
Problem 7
Which of the following is most likely to cause erosion of farmland during a severe drought? A. water runoff B. soil creeping downhill C. wind D. ice Use the table below to answer questions \(8-10\). \begin{tabular}{|c|c|c|c|} \hline \multicolumn{4}{|c|}{ Texture Data for a Soil Profile } \\ \hline \multirow{2}{*}{ Horizon } & \multicolumn{3}{|c|}{ Percent } \\ \cline { 2 - 4 } & Sand & Silt & Clay \\ \hline A & \(16.2\) & \(54.4\) & \(29.4\) \\ \hline B & \(10.5\) & \(50.2\) & \(39.3\) \\ \hline C & \(31.4\) & \(48.4\) & \(20.2\) \\ \hline\(R\) (bedrock) & \(31.7\) & \(50.1\) & \(18.2\) \\ \hline \end{tabular}
