What sedimentary structure is visible in this image?
A) Cross-bedding
B) Bedding
C) Deflation
D) Bajada
Answer: A
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Which of the following best describes steam powered airplanes?
A) They were widely used until the 1970s, when jet fuel prices made other engines more efficient. B) They are impractical because of the low power-to-weight advantage. C) They were used for commercial air travel but were discontinued because of safety regulations. D) They are under development and are expected to be the next phase of jet technology.
Social and spatial differences in internet access are due largely to
A) poverty. B) density, reliability and affordability of telephone systems. C) differentials in accessing the skills, equipment and software necessary. D) all of the above E) B and C only
Which of the following causes unstable air to keep lifting?
A) ascent into a layer of stable air B) entrainment C) inversions D) ascent into a layer of unstable air
Israel has controlled all of Jerusalem since
A) partition of Palestine by the United Nations in 1947. B) the withdrawal of British rule in 1948. C) the Arab-Israeli armistice of 1949. D) the Six-Day War in 1967. E) the Egyptian and Israeli peace treaty of 1979.