How many language families in the world have at least 100 million native speakers?

A) seven
B) nine
C) ten
D) twelve
E) fifteen


Answer: B

Environmental & Atmospheric Sciences

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Which of the following is true of the relationship between thiols and disulfides?

A) Thiols are easily oxidized to disulfides, and disulfides are easily reduced to thiols. B) Thiols are not easily oxidized to disulfides, and disulfides are not easily reduced to thiols. C) Thiols are easily oxidized to disulfides, but disulfides are not easily reduced to thiols. D) Thiols are not easily oxidized to disulfides, but disulfides are easily reduced to thiols.

Environmental & Atmospheric Sciences

All of the following factors would contribute to water to sinking at the poles EXCEPT:

A. absence of clouds. B. melting ice. C. formation of brine. D. lack of atmospheric water vapor.

Environmental & Atmospheric Sciences

The daily (diurnal) range of temperature is greatest next to the ____________________

Fill in the blank with correct word. Considering each hemisphere as a whole, seasonal temperature variation in the Southern Hemisphere is ____________________ that in the Northern Hemisphere. Fill in the blank with correct word.

Environmental & Atmospheric Sciences

What is NOT a valid option to help solve the mineral supply problem in the world?

A) using chemical processes to fabricate minerals from common substances B) extracting minerals from the ocean (this would require cheap electricity) C) reducing waste in the extraction and processing of minerals D) encouraging lower per capita levels of resource use E) reusing minerals (recycling)

Environmental & Atmospheric Sciences