What is the main frame of reference for GPS measurements?

A) rock compositions
B) satellite locations
C) Earth's magnetic pole
D) the absolute value of Earth's core


Answer: B

Environmental & Atmospheric Sciences

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List the following compounds in order of increasing boiling point: Cl4, CBr4, CCl4, CF4.

A. Cl4, CBr4, CCl4, CF4 B. Cl4, CCl4, CBr4, CF4 C. CF4, CCl4, CBr4, Cl4 D. CF4, CBr4, CCl4, Cl4

Environmental & Atmospheric Sciences

Despite a massive reduction in the poverty rate, upwards of how many Chinese still live on less than $1.25 a day?

A) 200,000 B) 200 million C) 2 billion D) 2 million E) 20 million

Environmental & Atmospheric Sciences

The zone that has no light is called the ________ zone

A) aphotic B) disphotic C) euphotic D) hyperphotic E) hypophotic

Environmental & Atmospheric Sciences

When was the eruption of Mount Tambora in Indonesia?

A) 2015 B) 1915 C) 1815 D) 1715 E) none of the above

Environmental & Atmospheric Sciences