The gases that make up 99% of Earth's atmosphere are
A. nitrogen and carbon dioxide.
B. oxygen and carbon dioxide.
C. oxygen and hydrogen.
D. oxygen and nitrogen.
Answer: D
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In 2014 the population of Earth is estimated to be about 7.2 billion
Indicate whether the statement is true or false.
A scientist identifies a rock sample as andesite. Why did he do so?
A) He observed that the rock has a lot of silica, making it mafic. B) He observed that the rock has a lot of silica, making it ultra-mafic. C) He observed that the rock has a decent amount of silica, making it intermediate. D) He observed that the sample has little silica, making it felsic.
Which statement best describes the relationship between remote sensing and GIS?
A) A GIS is used to create remotely sensed images. B) Remotely sensed images can be used in a GIS. C) Remote sensing is another term for GIS. D) There is no relationship. E) The letters in GIS stand for "remote sensing" in French.
If the mineral assemblage in metamorphic rocks is the same, they are regarded as having formed under similar pressure and temperature conditions and belong to the same ________.
A. metamorphic facies B. metamorphic temperature/pressure suite C. metamorphic mineral group D. metamorphic rock group E. metamorphic province