What is the approximated number of earthquakes detected every year?

a. One million
b. One thousand
c. One hundred
d. A few


Answer: a. One million

Environmental & Atmospheric Sciences

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The pKa of acetic acid, HC2H3O2, is 4.75. What is the pH of a buffer in which [HC2H3O2] = 0.20 M and [NaC2H3O2] = 2.0 M?

A) 3.75 B) 4.75 C) 5.75 D) 7.00

Environmental & Atmospheric Sciences

In the United States many farms are integrated into a large food production industry. This is known as

A) agribusiness. B) commercial farming. C) food processing. D) mechanized farming. E) mixed crop and livestock farming.

Environmental & Atmospheric Sciences

Which of the following conditions will occur when an upper-level low lies directly above a surface low?

A. Thunderstorms will develop. B. A wave cyclone will begin to form. C. The surface low will probably weaken. D. The pressure of the surface low will decrease.

Environmental & Atmospheric Sciences

Costa Rica is classified as a(n) ________ economy by the UN

A) low B) lower middle C) upper middle D) high

Environmental & Atmospheric Sciences