Chemical analyses of calcite composing the fossil microscopic shells of some marine plankton serve as proxy records of:
A) sea level.
B) ocean temperature.
C) glacial ice volume.
D) both B and C.
Answer: D
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An active galactic nucleus
A. is a supermassive supergiant star that resides at the center of larger galaxies. B. is a place of intense star formation. C. is a giant dust cloud at the center of a galaxy. D. arises from the gigantic black hole at the center of a galaxy.
The largest minority in the United States is
A. Spanish-speaking B. African American C. Asian American D. Native American
On a weather map of the Northern Hemisphere, the northeast trade winds would be observed ____
A) north of the polar front B) between the polar front and the subtropical highs C) south of the subtropical highs D) between the subpolar lows and the subtropical highs
Metal cations are transported from:
a. the A horizon to the B horizon b. the B horizon to the C horizon c. the A horizon to the C horizon d. the C horizon to the B horizon