Metamorphic rocks can sometimes contain unusually large grains surrounded by a fine-grained matrix of other minerals. These large crystals are called ________

A) vesicles
B) phenocrysts
C) inclusions
D) porphyroblasts


Answer: D

Environmental & Atmospheric Sciences

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Which of the following is true of the ionization energy of the elements?

A) Ionization energy generally decreases as we move left to right and decreases as we move top to bottom in the periodic table. B) Ionization energy generally decreases as we move left to right and increases as we move top to bottom in the periodic table. C) Ionization energy generally increases as we move left to right and decreases as we move top to bottom in the periodic table. D) Ionization energy generally increases as we move left to right and increases as we move top to bottom in the periodic table.

Environmental & Atmospheric Sciences

Which of the following is true of the transuranium elements?

A) Some are stable and some are unstable. B) They are all stable. C) They are all unstable, but all have long half-lives. D) They are all unstable and most have short half-lives.

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What type of mass movement involves saturated material moving downslope?

a. Slide b. Flow c. Fall

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What atmospheric layer is the home of weather, has the greatest density of gas molecules, and has a decrease in temperature with height?

A. mesosphere B. thermosphere C. troposphere D. stratosphere

Environmental & Atmospheric Sciences