Where is the impact crater that possibly formed the iridium layer located?
A. Yucatan Peninsula of Mexico
B. In the Mediterranean Sea
C. Beneath the Arctic ice cap
D. Meteor Crater, Arizona
Answer: A
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The focal point of the earliest Russian culture was centered around Slavic principalities in the area of which two modern cities?
A. Moscow and St. Petersburg B. Vladivostok and Irkutsk C. Novgorod and Kiev D. Stalingrad and Leningrad
Which of the following would do the most harm to the productivity of a garden?
A) Killing the fungi and bacteria in the soil B) Killing the nematodes and insects in the soil C) Adding humus and sandy loam to the soil D) Plowing into the soil the stalks from last year's crops
The constant path that Earth travels in its orbit around the Sun describes a surface called the plane of the ____
a. equinox b. inclination c. ecliptic d. declination e. perihelion
If upper-level divergence exceeds surface convergence, the air pressure at the center of the surface low will?
a. ?be unaffected. b. ?double. c. ?triple. d. ?increase. e. ?decrease.