What are the three major classifications of magma? How are they defined? What elements increase or
decrease in the composition of the three types? What will be an ideal response?
Felsic magma has more than 65% silica, mafic magma is less than 52% silica, and intermediate
magma falls in between. Sodium, potassium, and aluminum are higher in the more silica-rich magmas.
Calcium, iron, and magnesium are lower in the more silica-rich magmas.
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London, United Kingdom lacks extreme winter or summer temperatures and receives precipitation evenly distributed throughout the year. This is characteristic of this climate type:
A) humid continental B) Mediterranean C) marine west coast D) subpolar
The Geographical arrangement of things on earth is called
a. spatial organization or distribution. b. environmental expansion. c. environmental complexity. d. cultural landscape. e. none of the above.
The Great Plains region of the Central United States plays host to about ________ percent of the tornadoes that occur on Earth.
A. 25 B. 95 C. 70 D. 50 E. 10
An earthquake on a strike-slip fault could offset fence lines and roads on the surface
a. True b. False Indicate whether the statement is true or false