Human population growth rates and economic conditions in countries are related in which of the following ways?
A. Poor countries cannot afford to have very many children.
B. Countries with high income have more children.
C. Poor countries have higher population growth rates.
D. Rich countries can afford to support higher population growth rates.
Answer: C
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Why does an atom with many valence electrons tend to gain electrons rather than lose any?
A. Atoms with many valence electrons tend to have relatively strong forces of attraction between the valence electrons and the nucleus. This makes it easy for them to gain additional electrons. B. Atoms with many valence electrons tend to have relatively weak forces of attraction between the valence electrons and the nucleus. Therefore, the outer electrons are free to attract other electrons. C. There is stability in numbers. Atoms with many valence electrons are always attracting new electrons. D. The old adage that "he who has, gets" is also true in atomic structure. Atoms with many valence electrons can essentially overpower atoms with few valence electrons and attract additional electrons.
Ranching is practiced in the dry lands of both developing and relatively developed countries
Indicate whether the statement is true or false.
True or False: Movement along a dip-slip fault causes an abrupt vertical displacement of the ground surface called a fault scarp
Indicate whether this statement is true or false.
Explosive eruptions are associated with ____
a. low viscosity magma b. pyroclastics c. magma of low gas content d. pahoehoe