The current global human population is approximately ________
A) 1.5 million B) 7.3 million C) 1.5 billion D) 7.3 billion E) 10.2 billion
Answer: D
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Refraction occurs when light passing from one medium to another
A. loses energy. B. changes frequency. C. changes form. D. none of the above
Manganese and phosphorite nodules can only be observed in areas of high sediment accumulation
Indicate whether the statement is true or false
The largest plutons are called ____________________ and are made up primarily of ____________________ igneous rocks
Fill in the blank(s) with correct word
In Bowen's reaction series, as a magma gradually cools:
a. calcium-rich plagioclase reacts continuously with the magma to become more sodium rich b. sodium-rich plagioclase reacts continuously with the magma to become more calcium rich c. biotite reacts discontinuously with the magma to form olivine d. muscovite reacts discontinuously with the magma to form quartz