The basic sampling unit, in soil surveys representing all the characteristics and variability used for classification, is the

A) pedon. B) polypedon. C) soil horizon. D) soil section. E) soil profile.


A

Environmental & Atmospheric Sciences

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The average depth of the photic zone is ________ in open ocean waters

a. 200 meters (660 feet) b. 600 meters (2,000 feet) c. 100 meters (330 feet) d. 10 meters (33 feet)

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Radioactive decay in the Earth, especially in the Earth's crust, creates a tremendous amount of

A. pressure. B. heat.

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Making a new soda (pop) can out of recycled aluminum requires ________% less energy than making it out of bauxite (raw aluminum ore)

A) 95 B) 80 C) 70 D) 50 E) 25

Environmental & Atmospheric Sciences

________ is a byproduct of rock weathering.

A. Water B. Igneous rock C. Metamorphic rock D. Soil E. Oil

Environmental & Atmospheric Sciences