Which physical forces cause groundwater to flow?

a. Gravity
b. Molecular attraction
c. Pressure
d. All of the above
e. Both a and c


Answer: e. Both a and c

Environmental & Atmospheric Sciences

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Desertification occurring in the grasslands of the Sahel, bordering the Sahara, is the result of

A) careless overgrazing by local herders. B) expanding beef production for U.S. and European markets. C) a complex set of environmental, cultural and political economic factors. D) industrialization and urbanization. E) droughts and other acts of nature or God.

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Which of the following enzymes accelerates transcription?

A) phosphorylated protein kinases B) ribozymes C) tRNA synthetases D) all of these

Environmental & Atmospheric Sciences

Surface cyclones are accompanied by divergence aloft

Indicate whether the statement is true or false

Environmental & Atmospheric Sciences

A monocultural agriculture community is

A) not stable, but resilient B) neither stable nor resilient C) stable, but not resilient D) both stable and resilient E) moderately stable and resilient if agriculturalists take proper measures.

Environmental & Atmospheric Sciences