Is an ionic compound an example of a chemical compound, or is a chemical compound an example of an ionic compound?
A. A chemical compound is an example of an ionic compound.
B. Neither is an example of the other.
C. An ionic compound is an example of a chemical compound.
D. Each is an example of the other.
Answer: C
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Clouds continually are pulled to the ground by gravity. Why do they stay aloft?
A) Clouds weigh so little that they fall too slowly to be noticed. B) Water evaporating from Earth's surface presents an opposing force to the falling cloud droplets. C) New cloud droplets continually replace those that fall to Earth's surface. D) Updrafts of air oppose the gravitational force.
Clouds which have extensive vertical dimensions are often classified as:
A) cirrus. B) nimbus. C) cumulus. D) lenticularis.
Which Library of Alexandria librarian was responsible for the early development of the longitude and latitude system?
a. Hipparchus b. Claudius Ptolemy c. Hypatia d. Eratosthenes e. Pythagoreas
In the hydrologic cycle, most energy is stored in the oceans. From what source does the fuel for atmospheric storms come?
A) The oceans B) Water vapor C) Ground water D) Glacial ice E) Precipitation