The first commercial crop of the British North American colonies was
A. cotton
B. wheat
C. tea
D. tobacco
D. tobacco
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Which feature on this diagram is a cirque?
A) 1, the circular depression at the head of the valley
B) 2, a lake in the upper valley
C) 3, a steep ridge
D) 4, a valley that is above the level of the main valley
GIS refers to
A) Landsat. B) surveying. C) a computer system that stores, organizes and analyzes geographic data. D) an agency of the United Nations.
Two layers of limestone are found 200 kilometers apart. Give two lines of evidence that could show the layers are
correlated. What will be an ideal response?
Which of the following is true?
A) No amines form hydrogen bonds. B) The N-H- - - -N hydrogen bond is stronger than the O-H- - - -O hydrogen bond. C) The N-H- - - -N hydrogen bond is the same strength as the O-H- - - -O hydrogen bond. D) The N-H- - - -N hydrogen bond is weaker than the O-H- - - -O hydrogen bond.