If an igneous rock is heated, which mineral will be the very last mineral left to melt according to the Bowen's reaction series?
A) Quartz
B) Pyroxene
C) Potassium feldspar
D) Olivine
Answer: D
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In highlands, topography influences ecosystems by limiting the number of microclimates present to only one or two
a. True b. False Indicate whether the statement is true or false
Using the data in this table, calculate the number of half-lives that have passed for the dike (unit D on this table).
A. 1 B. 2 C. 3 D. 4 E. 5
The valence electron of a sodium atom does not sense the full +11 of the sodium nucleus. Why not?
A. Since the +11 charge is spread evenly around the entire spherical surface of the nucleus, the actual force of the charge in any given direction is greatly diminished. B. There are two inner shells of electrons containing ten electrons shielding the sodium nucleus from sensing it. C. The distance from the nucleus to the loosely held lone valence electron varies greatly over time. So, the average sense of charge from the nucleus is considerably less than +11. D. There are two "nonvalence shell" electrons shielding the sodium nucleus from sensing it.
The two types of body waves are ____________________ wave and ____________________ waves. Fill in the blank(s) with the appropriate word(s)