What is the half-life of the decay of uranium
238 to lead 206?
a. 2.5 million years.
b. 220 million years.
c. 1.2 billion years.
d. 2.5 billion years.
e. 4.5 billion years
E
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If you were able to increase the kinetic energy of the molecules inside your body, how would this affect your body temperature?
A. It would increase B. It would remain the same C. It would decrease
What does the term theory mean to a scientist?
A) A guess B) A proposed explanation for an observed phenomenon C) A hypothesis that has been supported by the evidence of an experiment D) A broad hypothesis that has been supported by a large number of experiments
More sparse urban settlement patterns may help conserve energy and preserve the environment.
a. true b. false
Which of the following is true?
a. No species of slime mold form colonies. b. All species of slime mold form colonies. c. Slime molds form colonies only for reproduction. d. Some species of slime molds form colonies.