The most common detrital sedimentary rocks are sandstones and mud rocks
a. True
b. False
True
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Which of the following rock photographs depicts an igneous rock that trapped gas?
A. 
B. 
C. 
D. 
The shape of a country's population pyramid
A) may be used to predict maternal mortality rates. B) cannot be used to determine infant mortality rates. C) may be used to estimate the country's dependency rate. D) cannot be used to estimate the country's sex ratio. E) is determined primarily by the combination of its crude birth rate and its crude growth rate.
The diagram below shows a simple cross section through an aquifer in a small rural community. Which of the three wells shown is likely an artesian well?
A. Well A B. Well B C. Well C
The most prominent physical landscape of the Central Africa realm is the __________.
a. tropical rain forests b. Cameroon Highlands c. Great Rift Valley d. Lake Chad e. volcanic island São Tomé and Príncipe