What is a common source of exceptionally large grains of quartz and feldspar?

A. Kimberlites
B. Layered intrusions
C. Hydrothermal deposits
D. Pegmatites


Answer: D

Environmental & Atmospheric Sciences

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Since the 1980s, the Brazilian Amazon has been cleared at rates of slightly less than 12 percent per year, an area roughly twice the size of the state of Texas

Indicate whether the statement is true or false.

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This Arabic word for migration is also used to describe Mohammed's flight from persecution

A) Hajj B) Hegira C) Salat D) Yathrib E) Makkah

Environmental & Atmospheric Sciences

On ____, the equator receives direct rays from the sun

a. September 22 b. March 21 c. September 22 and March 21 d. none of these

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The horizon in which water moves fine particles downward in a process called eluviation is the ________ horizon

A) A B) O C) E D) B E) C

Environmental & Atmospheric Sciences