The longest subdivision of the geologic time scale is the ________

A) epoch
B) eon
C) era
D) period


Answer: B

Environmental & Atmospheric Sciences

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Which of the following best describes ecotones?

A) They contain only species found in the bordering ecosystems. B) They have the same abiotic characteristics as the bordering ecosystems. C) They consist of many distinct landscapes. D) They are transitional regions between ecosystems and may contain unique species.

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Given that climate correlates closely with vegetation, what letter approximates the type of vegetation you would see for an Am climate?

A. A B. B C. C

Environmental & Atmospheric Sciences

The wave you surf on in California may have come from the middle of the Pacific. What has been transmitted across the ocean basin?

a. a surface current b. wind c. energy d. water

Environmental & Atmospheric Sciences

The highest rates of productivity in temperate waters occur in ________.

A. winter B. summer C. fall D. spring E. Productivity is the same during all seasons.

Environmental & Atmospheric Sciences