Most geologists think that the flat summits of seamounts ________.

A. are remnants of the continental shelf
B. are fault surfaces
C. are uplifted sea floor
D. are remnants of plateau basalts
E. were eroded flat by wave action


Answer: E

Environmental & Atmospheric Sciences

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A valley train is ____

a. a string of lakes in a glaciated valley b. a deposit of till where a hanging valley entered the trunk glacier c. a first-order tributary glacier d. stream-deposited sediment just beyond the toe of a valley glacier

Environmental & Atmospheric Sciences

Which one of the following is likely to be associated with a loss of genetic diversity in a local population of a species?

A. The arrival of individuals of the same species from distant populations. B. Genetic mutations. C. A 90% reduction in the size of the population. D. Mating with individuals from other populations.

Environmental & Atmospheric Sciences

The U.S. steel industry moved westward in the nineteenth century primarily because of better access to

A) coal. B) iron ore. C) labor. D) transport. E) markets.

Environmental & Atmospheric Sciences

Exposure to 1.0 roentgen of which of the following types of radiation causes the formation of the most ions?

A) a B) b C) g D) They all form the same number of ions.

Environmental & Atmospheric Sciences