The particles found in some sediment that suggests that an extraterrestrial impact event are ________
A) tektites
B) oozes
C) clays
D) silt
E) evaporites
A
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In which of the following is the amino nitrogen also part of the side chain?
A) cysteine B) glycine C) proline D) tryptophan
Which of the following statements about PV cells is false?
a. Not only Google, but more than 75 schools and colleges in California have parking lots covered with canopies of PV cells b. Solar cells have no moving parts and are safe and quiet c. The U.S. government is the current global leader in photovoltaic production. d. Generating electricity with such solar cells could be nearly as efficient as using coal-burning power plants e. Over the next one to two decades production of such cells is expected to increase sharply
An increase in earthquake magnitude by one whole number (for example, from 6 to 7) means that the energy released has increased by a factor of about ____
a. 10 b. 30 c. 200 d. 1,000
The gradual establishment of communities in areas where soil did not previously exist is known as ____________________.
Fill in the blank(s) with the appropriate word(s).