After data have been analyzed, tentative explanations or solutions proposed based on the data are called:

a) a guess
b) an observation of a phenomenon
c) a hypothesis
d) a concept that has been tested reproducibly and is likely to be true
e) a law of nature


Answer: c) a hypothesis

Environmental & Atmospheric Sciences

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Which of the following is valid for how rocks weather?

A) Quartz is very soluble during weathering at low temperatures. B) Limestone weathers rapidly in wet climates but can form cliffs in dry ones. C) As a granite weathers, quartz rapidly decomposes into clay minerals. D) Most minerals in granite weather at nearly the same rate and so granite has smooth surfaces.

Environmental & Atmospheric Sciences

Brightly colored antique children's toys from before 1970 may be colored with paints that are contaminated with

A) heavy metals. B) toxic plastic compounds. C) synthetic organic compounds. D) synthetic inorganic compounds.

Environmental & Atmospheric Sciences

List the four countries that belong to the Slavic area:

Environmental & Atmospheric Sciences

Which of the following countries did not become independent after WW II?

A) New Caledonia B) Papua New Guinea C) Fiji D) Western Samoa E) none of the above

Environmental & Atmospheric Sciences