Why does Basaltic magma have the lowest viscosity?
A) Basaltic lava has more silicate.
B) Basaltic lava has less silicate.
C) Basaltic lava is hotter than other flows.
D) Basaltic lava is less hot than other flows.
Answer: B
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Why does finding stishovite at Earth's surface indicate an asteroid impact occurred in the area?
A. Stishovite contains elements not found on Earth. B. Stishovite forms as the outer surface of an asteroid cools after an impact. C. Stishovite grows in soil enriched in iridium. D. Stishovite forms as quartz is subjected to the high pressure during an impact. E. The cores of most asteroids contain the otherwise rare stishovite.
Which of the following kinds of coal has the highest carbon content?
A. Bituminous B. Brown coal C. Sub-bituminous D. Lignite
What African nation has one of the world's most comprehensive bills of rights and anti-discrimination constitutions?
A) Namibia B) South Africa C) Ghana D) Ethiopia E) Botswana
Despite the similar appearance of mammoths to elephants, the mammoths and elephants are not related
a. True b. False