Earth Science - June 2011

31 The cross section below shows four rock units, A, B, C, and D.

32 The incomplete flowchart below shows some of the changes that occur in warm air as it rises to form a cloud.

Which statement should be placed in the empty box to accurately complete the flowchart?

(1) The air warms as it expands.
(2) The air cools until it reaches the dewpoint.
(3) The air’s relative humidity decreases to zero.
(4) The air enters the thermosphere.

33 The highest surface wind speeds occur when there is a

(1) 4-millibar air-pressure difference between two nearby locations
(2) 4-millibar air-pressure difference between two distant locations
(3) 20-millibar air-pressure difference between two nearby locations
(4) 20-millibar air-pressure difference between two distant locations

34 The block diagram below shows a portion of Earth’s crust.

Which stream drainage pattern is most likely present on this crustal surface?

35 The contour map below shows elevations recorded in meters. Line AB is a reference line on the map.

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