Which of these textures help geologists determine if a rock is volcanic in origin?

A) Pegmatitic
B) Aphanitic
C) Porphyritic
D) Phaneritic


Answer: B

Environmental & Atmospheric Sciences

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Waves converge on headlands due to ________

A) constructive interference B) destructive interference C) wave diffraction D) wave reflection E) wave refraction

Environmental & Atmospheric Sciences

Investors have considered Africa an unfriendly business environment due to poverty, corruption, and low quality of life.Recently, this attitude has changed, with Africa becoming more attractive to investors.What factors have contributed to the turnabout in African business opportunities?

Environmental & Atmospheric Sciences

A large region identifiable by several topographic or geological traits is known as a

A) ecoregion. B) topographic region. C) physiographic province. D) biome.

Environmental & Atmospheric Sciences

Which emits radiation of the highest frequency?

A. The Sun. B. A blue-hot star. C. A red-hot star. D. all the same

Environmental & Atmospheric Sciences