Andalusite, kyanite, and sillimanite are described as polymorphs. What does this mean?

A) They have the same atomic structure but different chemical compositions.
B) They have the same chemical composition but different atomic structures.
C) They all morphed at the same time.
D) They are exact opposites of one another.


Answer: B

Environmental & Atmospheric Sciences

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Which of the following have been tried by 20th-century states to eliminate or minimize the potential for fragmenting or breaking apart?

A) decentralization of power B) consolidation or centralization of power C) destruction of ethnic minorities D) increased autonomy to ethnic minorities E) decentralization of power, consolidation or centralizing of power, destruction of ethnic minorities, and increased autonomy of ethnic minorities

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For Earth's energy budget, ________ is energy income and ________ energy expenditures

A) refraction; scatter B) insolation; radiation to space C) transmission; reflection D) reflection; albedo

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________ is the powdered form of the mineral

A) Density B) Streak C) Hardness D) Crystal habit

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The upper mantle is rigid, whereas the asthenosphere is plastic-like

Indicate whether the statement is true or false

Environmental & Atmospheric Sciences