How many valence electrons does boron (B, atomic no. = 5) have?
A. 1
B. 2
C. 3
D. 4
E. 5
Answer: C
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Which of the following best matches the description?Process of breaking up large particles by chemical reactions.
A. soil texture B. loam C. contour farming D. humus E. soil structure F. parent material G. friable H. leaching I. soil profile J. windbreak K. lithosphere L. mechanical weathering M. chemical weathering N. weathering O. terrace P. horizon Q. asthenosphere
Which of the following rock types requires dissolved gas in the magma?
A. gabbro B. diorite C. andesite D. pumice E. granite
Continents tend to have the oldest rocks in the center with younger rocks flanking the center. Explain this observation, with reference to cratons and exotic terranes
What will be an ideal response?
Warm advection occurs when the
a. wind veers (changes direction in a clockwise manner) with height. b. wind backs (changes direction in a counterclockwise manner) with height. c. isotherms are parallel to the winds. d. wind veers with height and the isotherms are parallel to the winds. e. Sun angle is 90 degrees.