Which of the following is common during crystallization of magma?
a. felsic minerals crystallize first
b. mafic minerals are light and float in most magma chambers
c. felsic crystals are heavy and sink in most magma chambers
d. all crystals form at about the same time
e. none of these
Ans: e. none of these
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Using the world map (Figure 2), label the following continents and oceans: Africa, Antarctica, Asia, Australia, Europe, North America, South America, Arctic Ocean, Atlantic Ocean, Indian Ocean, Pacific Ocean, and Southern Ocean. What will be an ideal response?
Which of the following is not a lymphoid organ?
A) spleen B) thymus C) tonsils D) None of these, they are all lymphoid organs.
Stationary fronts
A) are usually cloudless. B) are the same as occluded fronts. C) occur when two cold fronts meet. D) occur inside a single air mass. E) are often accompanied by precipitation.
Some governments legally recognize slum areas of the urban poor in developing countries. On reason for this is that people living in slums tend to
A. utilize discarded building materials supplied by the government. B. work to improve their living conditions if they know they can stay in an area. C. rely on government subsidies for access to clean water, sewers, electricity and roads. D. picket for basic services on government property, thereby creating a distraction. E. occupy other legal properties nearby when their properties are illegal