What is a technique used to estimate past temperatures on Earth recorded in very old ice layers?
a. Ice coring
b. Oxygen-isotope analysis
c. CaCO3 analysis
d. Radioactive decay
b
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What type of rock likely composes the landscape shown in this photograph from the Investigation?
A. volcanic rocks, probably basalt B. metamorphic rocks C. granite D. sedimentary rocks
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.
The principal force affecting world population distribution is
A) age-dependency ratio B) famine C) migration D) natural increase E) plague
Central America, Middle America, and South America are three terms that refer to geographic areas of Latin America. Describe the areas each of the three terms represents